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<div class="vector-toc-text">Inizio</div> </a> </li> <li id="toc-Etimologia" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Etimologia"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Etimologia</span> </div> </a> <ul id="toc-Etimologia-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Caratteri_mineralogici" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Caratteri_mineralogici"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Caratteri mineralogici</span> </div> </a> <ul id="toc-Caratteri_mineralogici-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Origine" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Origine"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Origine</span> </div> </a> <ul id="toc-Origine-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Composizione_chimica_e_norma" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Composizione_chimica_e_norma"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Composizione chimica e norma</span> </div> </a> <ul id="toc-Composizione_chimica_e_norma-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Distribuzione" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Distribuzione"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Distribuzione</span> </div> </a> <ul id="toc-Distribuzione-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Utilizzo" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Utilizzo"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Utilizzo</span> </div> </a> <ul id="toc-Utilizzo-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Note" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Note"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>Note</span> </div> </a> <ul id="toc-Note-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Bibliografia" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Bibliografia"> <div class="vector-toc-text"> <span class="vector-toc-numb">8</span> <span>Bibliografia</span> </div> </a> <ul id="toc-Bibliografia-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Voci_correlate" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Voci_correlate"> <div class="vector-toc-text"> <span class="vector-toc-numb">9</span> <span>Voci correlate</span> </div> </a> <ul id="toc-Voci_correlate-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Altri_progetti" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Altri_progetti"> <div class="vector-toc-text"> <span class="vector-toc-numb">10</span> <span>Altri progetti</span> </div> </a> <ul id="toc-Altri_progetti-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Collegamenti_esterni" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Collegamenti_esterni"> <div class="vector-toc-text"> <span class="vector-toc-numb">11</span> <span>Collegamenti esterni</span> </div> </a> <ul id="toc-Collegamenti_esterni-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Indice" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Mostra/Nascondi l'indice" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Mostra/Nascondi l'indice</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Trachite</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Vai a una voce in un'altra lingua. Disponibile in 43 lingue" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-43" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">43 lingue</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%AA%D8%B1%D8%A7%D9%83%D9%8A%D8%AA" title="تراكيت - arabo" lang="ar" hreflang="ar" data-title="تراكيت" data-language-autonym="العربية" data-language-local-name="arabo" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%A2%D1%80%D0%B0%D1%85%D1%96%D1%82" title="Трахіт - bielorusso" lang="be" hreflang="be" data-title="Трахіт" data-language-autonym="Беларуская" data-language-local-name="bielorusso" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-be-x-old mw-list-item"><a href="https://be-tarask.wikipedia.org/wiki/%D0%A2%D1%80%D0%B0%D1%85%D1%96%D1%82" title="Трахіт - Belarusian (Taraškievica orthography)" lang="be-tarask" hreflang="be-tarask" data-title="Трахіт" data-language-autonym="Беларуская (тарашкевіца)" data-language-local-name="Belarusian (Taraškievica orthography)" class="interlanguage-link-target"><span>Беларуская (тарашкевіца)</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%A2%D1%80%D0%B0%D1%85%D0%B8%D1%82" title="Трахит - bulgaro" lang="bg" hreflang="bg" data-title="Трахит" data-language-autonym="Български" data-language-local-name="bulgaro" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Traquita" title="Traquita - catalano" lang="ca" hreflang="ca" data-title="Traquita" data-language-autonym="Català" data-language-local-name="catalano" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Trachyt" title="Trachyt - ceco" lang="cs" hreflang="cs" data-title="Trachyt" data-language-autonym="Čeština" data-language-local-name="ceco" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Trakyt" title="Trakyt - danese" lang="da" hreflang="da" data-title="Trakyt" data-language-autonym="Dansk" data-language-local-name="danese" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Trachyt" title="Trachyt - tedesco" lang="de" hreflang="de" data-title="Trachyt" data-language-autonym="Deutsch" data-language-local-name="tedesco" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Trachyte" title="Trachyte - inglese" lang="en" hreflang="en" data-title="Trachyte" data-language-autonym="English" data-language-local-name="inglese" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Tra%C4%A5ito" title="Traĥito - esperanto" lang="eo" hreflang="eo" data-title="Traĥito" data-language-autonym="Esperanto" data-language-local-name="esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Traquita" title="Traquita - spagnolo" lang="es" hreflang="es" data-title="Traquita" data-language-autonym="Español" data-language-local-name="spagnolo" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Trahh%C3%BC%C3%BCt" title="Trahhüüt - estone" lang="et" hreflang="et" data-title="Trahhüüt" data-language-autonym="Eesti" data-language-local-name="estone" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Trakita" title="Trakita - basco" lang="eu" hreflang="eu" data-title="Trakita" data-language-autonym="Euskara" data-language-local-name="basco" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%B2%D8%A8%D8%B1%D9%87%E2%80%8C%D8%B3%D9%86%DA%AF" title="زبره‌سنگ - persiano" lang="fa" hreflang="fa" data-title="زبره‌سنگ" data-language-autonym="فارسی" data-language-local-name="persiano" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Trakyytti" title="Trakyytti - finlandese" lang="fi" hreflang="fi" data-title="Trakyytti" data-language-autonym="Suomi" data-language-local-name="finlandese" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Trachyte" title="Trachyte - francese" lang="fr" hreflang="fr" data-title="Trachyte" data-language-autonym="Français" data-language-local-name="francese" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%98%D7%A8%D7%9B%D7%99%D7%98" title="טרכיט - ebraico" lang="he" hreflang="he" data-title="טרכיט" data-language-autonym="עברית" data-language-local-name="ebraico" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Trachit" title="Trachit - ungherese" lang="hu" hreflang="hu" data-title="Trachit" data-language-autonym="Magyar" data-language-local-name="ungherese" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D5%8F%D6%80%D5%A1%D5%AD%D5%AB%D5%BF" title="Տրախիտ - armeno" lang="hy" hreflang="hy" data-title="Տրախիտ" data-language-autonym="Հայերեն" data-language-local-name="armeno" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Trasit" title="Trasit - indonesiano" lang="id" hreflang="id" data-title="Trasit" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonesiano" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-io mw-list-item"><a href="https://io.wikipedia.org/wiki/Trakito" title="Trakito - ido" lang="io" hreflang="io" data-title="Trakito" data-language-autonym="Ido" data-language-local-name="ido" class="interlanguage-link-target"><span>Ido</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E7%B2%97%E9%9D%A2%E5%B2%A9" title="粗面岩 - giapponese" lang="ja" hreflang="ja" data-title="粗面岩" data-language-autonym="日本語" data-language-local-name="giapponese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/%E1%83%A2%E1%83%A0%E1%83%90%E1%83%A5%E1%83%98%E1%83%A2%E1%83%98" title="ტრაქიტი - georgiano" lang="ka" hreflang="ka" data-title="ტრაქიტი" data-language-autonym="ქართული" data-language-local-name="georgiano" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/%D0%A2%D1%80%D0%B0%D1%85%D0%B8%D1%82" title="Трахит - kazako" lang="kk" hreflang="kk" data-title="Трахит" data-language-autonym="Қазақша" data-language-local-name="kazako" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%A1%B0%EB%A9%B4%EC%95%94" title="조면암 - coreano" lang="ko" hreflang="ko" data-title="조면암" data-language-autonym="한국어" data-language-local-name="coreano" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-ky mw-list-item"><a href="https://ky.wikipedia.org/wiki/%D0%A2%D1%80%D0%B0%D1%85%D0%B8%D1%82" title="Трахит - kirghiso" lang="ky" hreflang="ky" data-title="Трахит" data-language-autonym="Кыргызча" data-language-local-name="kirghiso" class="interlanguage-link-target"><span>Кыргызча</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%A2%D1%80%D0%B0%D1%85%D0%B8%D1%82" title="Трахит - macedone" lang="mk" hreflang="mk" data-title="Трахит" data-language-autonym="Македонски" data-language-local-name="macedone" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-nds-nl mw-list-item"><a href="https://nds-nl.wikipedia.org/wiki/Tracheet" title="Tracheet - basso tedesco olandese" lang="nds-NL" hreflang="nds-NL" data-title="Tracheet" data-language-autonym="Nedersaksies" data-language-local-name="basso tedesco olandese" class="interlanguage-link-target"><span>Nedersaksies</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Trachiet" title="Trachiet - olandese" lang="nl" hreflang="nl" data-title="Trachiet" data-language-autonym="Nederlands" data-language-local-name="olandese" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Trachytt" title="Trachytt - norvegese nynorsk" lang="nn" hreflang="nn" data-title="Trachytt" data-language-autonym="Norsk nynorsk" data-language-local-name="norvegese nynorsk" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Trachit" title="Trachit - polacco" lang="pl" hreflang="pl" data-title="Trachit" data-language-autonym="Polski" data-language-local-name="polacco" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Traquito" title="Traquito - portoghese" lang="pt" hreflang="pt" data-title="Traquito" data-language-autonym="Português" data-language-local-name="portoghese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Trahit" title="Trahit - rumeno" lang="ro" hreflang="ro" data-title="Trahit" data-language-autonym="Română" data-language-local-name="rumeno" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%A2%D1%80%D0%B0%D1%85%D0%B8%D1%82" title="Трахит - russo" lang="ru" hreflang="ru" data-title="Трахит" data-language-autonym="Русский" data-language-local-name="russo" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Trahit" title="Trahit - serbo-croato" lang="sh" hreflang="sh" data-title="Trahit" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="serbo-croato" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Trachyt" title="Trachyt - slovacco" lang="sk" hreflang="sk" data-title="Trachyt" data-language-autonym="Slovenčina" data-language-local-name="slovacco" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Trahit" title="Trahit - sloveno" lang="sl" hreflang="sl" data-title="Trahit" data-language-autonym="Slovenščina" data-language-local-name="sloveno" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%A2%D1%80%D0%B0%D1%85%D0%B8%D1%82" title="Трахит - serbo" lang="sr" hreflang="sr" data-title="Трахит" data-language-autonym="Српски / srpski" data-language-local-name="serbo" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Trakyt" title="Trakyt - svedese" lang="sv" hreflang="sv" data-title="Trakyt" data-language-autonym="Svenska" data-language-local-name="svedese" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Trakit" title="Trakit - turco" lang="tr" hreflang="tr" data-title="Trakit" data-language-autonym="Türkçe" data-language-local-name="turco" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%A2%D1%80%D0%B0%D1%85%D1%96%D1%82" title="Трахіт - ucraino" lang="uk" hreflang="uk" data-title="Трахіт" data-language-autonym="Українська" data-language-local-name="ucraino" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/Traxit" title="Traxit - uzbeco" lang="uz" hreflang="uz" data-title="Traxit" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="uzbeco" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E7%B2%97%E9%9D%A2%E5%B2%A9" title="粗面岩 - cinese" lang="zh" hreflang="zh" data-title="粗面岩" data-language-autonym="中文" data-language-local-name="cinese" 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href="/wiki/File:Mineraly.sk_-_trachyt.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/7/7f/Mineraly.sk_-_trachyt.jpg/260px-Mineraly.sk_-_trachyt.jpg" decoding="async" width="260" height="153" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/7/7f/Mineraly.sk_-_trachyt.jpg 1.5x" data-file-width="340" data-file-height="200" /></a><figcaption></figcaption></figure></td></tr><tr><th>Categoria</th><td style="width:60%"><a href="/wiki/Roccia_magmatica" title="Roccia magmatica">roccia magmatica</a> </td></tr><tr><th>Sottocategoria</th><td style="width:60%">roccia effusiva </td></tr><tr><th><a href="/wiki/Minerale" title="Minerale">Minerali principali</a></th><td style="width:60%"><a href="/wiki/Sanidino" title="Sanidino">sanidino</a> o <a href="/wiki/Anortoclasio" title="Anortoclasio">anortoclasio</a>, <a href="/wiki/Plagioclasio" title="Plagioclasio">plagioclasio</a> sodico e <a href="/wiki/Biotite" title="Biotite">biotite</a> ± <a href="/wiki/Anfiboli" class="mw-redirect" title="Anfiboli">anfiboli</a> ± <a href="/wiki/Pirosseni" class="mw-redirect" title="Pirosseni">pirosseni</a> ± <a href="/wiki/Olivina" title="Olivina">olivina</a> </td></tr><tr><th>Minerali accessori</th><td style="width:60%"><a href="/wiki/Magnetite" title="Magnetite">magnetite</a>, <a href="/wiki/Apatite" title="Apatite">apatite</a> </td></tr><tr><th>Colore</th><td style="width:60%">biancastro, grigio-giallognolo </td></tr><tr><th>Ambiente di formazione</th><td style="width:60%">isole vulcaniche oceaniche non sull'asse delle dorsali, aree continentali soggette a sollevamenti non orogenici </td></tr><tr class="sinottico_divisione"><th colspan="2" style="background: #DDDDCC">Sezioni sottili di trachite</th></tr><tr><td class="sinottico_testo_centrale" colspan="2" style="width:60%"><figure class="mw-halign-center" typeof="mw:File/Frameless"><a href="/wiki/File:Trachyte-micro.jpg" class="mw-file-description" title="Sezione di trachite vista a un solo polarizzatore"><img alt="Sezione di trachite vista a un solo polarizzatore" src="//upload.wikimedia.org/wikipedia/commons/thumb/6/68/Trachyte-micro.jpg/260px-Trachyte-micro.jpg" decoding="async" width="260" height="195" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/68/Trachyte-micro.jpg/390px-Trachyte-micro.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/68/Trachyte-micro.jpg/520px-Trachyte-micro.jpg 2x" data-file-width="2816" data-file-height="2112" /></a><figcaption>Sezione di trachite vista a un solo polarizzatore</figcaption></figure>Immagine a <a href="/wiki/Microscopio_polarizzatore#Metodi_di_analisi" title="Microscopio polarizzatore">nicol paralleli</a> </td></tr><tr><td class="sinottico_testo_centrale" colspan="2" style="width:60%"><figure class="mw-halign-center" typeof="mw:File/Frameless"><a href="/wiki/File:Trachyte-micro-nicols.jpg" class="mw-file-description" title="Sezione di trachite vista a nicol incrociati"><img alt="Sezione di trachite vista a nicol incrociati" src="//upload.wikimedia.org/wikipedia/commons/thumb/1/1f/Trachyte-micro-nicols.jpg/260px-Trachyte-micro-nicols.jpg" decoding="async" width="260" height="195" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/1/1f/Trachyte-micro-nicols.jpg/390px-Trachyte-micro-nicols.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/1/1f/Trachyte-micro-nicols.jpg/520px-Trachyte-micro-nicols.jpg 2x" data-file-width="2816" data-file-height="2112" /></a><figcaption>Sezione di trachite vista a nicol incrociati</figcaption></figure>Immagine a <a href="/wiki/Microscopio_polarizzatore#Metodi_di_analisi" title="Microscopio polarizzatore">nicol incrociati</a> </td></tr></tbody></table> <p>La <b>trachite</b> è una <a href="/wiki/Roccia_magmatica" title="Roccia magmatica">roccia magmatica</a> <a href="/wiki/Roccia_effusiva" title="Roccia effusiva">effusiva</a> di composizione intermedia e chimismo alcalino, equivalente effusivo delle <a href="/wiki/Sienite" title="Sienite">sieniti</a>. Ha tessitura <a href="/wiki/Tessitura_(petrografia)" title="Tessitura (petrografia)">porfirica, ipocristallina o olocristallina</a>, spesso <a href="/wiki/Tessitura_(petrografia)" title="Tessitura (petrografia)">vacuolare</a> o finemente porosa e perciò a superficie ruvida. È di colore chiaro, biancastro o grigio-giallastro e composta principalmente da <a href="/wiki/Sanidino" title="Sanidino">sanidino</a> o <a href="/wiki/Anortoclasio" title="Anortoclasio">anortoclasio</a>, <a href="/wiki/Plagioclasio" title="Plagioclasio">plagioclasio</a> e <a href="/wiki/Biotite" title="Biotite">biotite</a> con ± <a href="/wiki/Pirosseno" title="Pirosseno">clinopirosseni</a> e/o <a href="/wiki/Anfibolo" title="Anfibolo">anfiboli</a> e/o <a href="/wiki/Olivina" title="Olivina">olivina</a>. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Etimologia">Etimologia</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Trachite&veaction=edit&section=1" title="Modifica la sezione Etimologia" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Trachite&action=edit&section=1" title="Edit section's source code: Etimologia"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Il nome viene dal <a href="/wiki/Lingua_greca" title="Lingua greca">greco</a> τραχύς (trachýs) = ruvido, per l'aspetto scabro e poroso della superficie della roccia. </p> <div class="mw-heading mw-heading2"><h2 id="Caratteri_mineralogici">Caratteri mineralogici</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Trachite&veaction=edit&section=2" title="Modifica la sezione Caratteri mineralogici" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Trachite&action=edit&section=2" title="Edit section's source code: Caratteri mineralogici"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size mw-halign-left" typeof="mw:File/Thumb"><a href="/wiki/File:QAPF_trachite.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/9/98/QAPF_trachite.jpg/220px-QAPF_trachite.jpg" decoding="async" width="220" height="249" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/98/QAPF_trachite.jpg/330px-QAPF_trachite.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/98/QAPF_trachite.jpg/440px-QAPF_trachite.jpg 2x" data-file-width="1772" data-file-height="2008" /></a><figcaption>Posizione delle trachiti nel <a href="/wiki/Diagramma_QAPF" title="Diagramma QAPF">Diagramma QAPF</a></figcaption></figure> <figure class="mw-default-size mw-halign-left" typeof="mw:File/Thumb"><a href="/wiki/File:Nomenclatura_delle_trachiti_su_base_normativa.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/1/15/Nomenclatura_delle_trachiti_su_base_normativa.jpg/220px-Nomenclatura_delle_trachiti_su_base_normativa.jpg" decoding="async" width="220" height="200" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/1/15/Nomenclatura_delle_trachiti_su_base_normativa.jpg/330px-Nomenclatura_delle_trachiti_su_base_normativa.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/1/15/Nomenclatura_delle_trachiti_su_base_normativa.jpg/440px-Nomenclatura_delle_trachiti_su_base_normativa.jpg 2x" data-file-width="986" data-file-height="898" /></a><figcaption>Nomenclatura delle trachiti in base al rapporto tra % normativa di quarzo o nefelina e Indice di Differenziazione (I.D.). L'I.D. è dato dalla somma delle percentuali normative di quarzo (Q), albite (ab), ortoclasio (or), nefelina (ne), leucite (lc) e metasilicato di potassio (kp).</figcaption></figure> <p>Nelle trachiti il minerale nettamente prevalente è il <a href="/wiki/Feldspato" title="Feldspato">feldspato alcalino</a>, presente sia come <a href="/wiki/Fenocristallo" title="Fenocristallo">fenocristalli</a> che come microliti nella pasta di fondo. Si tratta generalmente di <a href="/wiki/Sanidino" title="Sanidino">sanidino</a> nelle varietà potassiche e di <a href="/wiki/Anortoclasio" title="Anortoclasio">anortoclasio</a> o più raramente <a href="/wiki/Albite" title="Albite">albite</a> nelle varietà sodiche. I loro fenocristalli, tabulari e allungati, di solito sono fittamente addossati e isorientati dal flusso della lava, conferendo alla roccia una particolare tessitura detta <i>trachitica</i>.<br />Il <a href="/wiki/Plagioclasio" title="Plagioclasio">plagioclasio</a> (oligoclasio o andesina) è sempre presente in quantità comprese tra il 10 e il 35% sul volume totale dei feldspati ma di solito non forma fenocristalli. Il <a href="/wiki/Quarzo" title="Quarzo">quarzo</a>, se presente nella pasta di fondo, non supera il 5% del volume totale della roccia, che pertanto si può definire satura in <a href="/wiki/Silice" title="Silice">silice</a>. I minerali femici sono decisamente subordinati. Il vetro è scarso e interstiziale o assente. Accessori frequenti sono l'<a href="/wiki/Apatite" title="Apatite">apatite</a> e la <a href="/wiki/Magnetite" title="Magnetite">magnetite</a>. </p><p>Se il quarzo è in quantità maggiore, fino al 20% del volume totale della roccia, si passa alle <b>quarzo-trachiti</b>. Le <b>trachiti a foidi</b> contengono fino al 10% in volume di <a href="/wiki/Feldspatoide" title="Feldspatoide">feldspatoidi</a> e/o <a href="/wiki/Olivina" title="Olivina">olivina</a>. </p><p>Quando il contenuto in vetro è consistente e non consente la classificazione su base <a href="/wiki/Moda_(petrografia)" title="Moda (petrografia)">modale</a> con il <a href="/wiki/Diagramma_QAPF" title="Diagramma QAPF">diagramma QAPF</a> di Streckeisen, si usa lo schema classificativo a sinistra, basato sui <a href="/wiki/Norma_(petrografia)" title="Norma (petrografia)">costituenti normativi</a>, che discrimina meglio le caratteristiche delle trachiti rispetto al diagramma TAS (vedi più in basso). L'aggettivo peralcaline si usa in caso di presenza di uno o più costituenti normativi peralcalini: <i>Ac</i> (<a href="/w/index.php?title=Acmite&action=edit&redlink=1" class="new" title="Acmite (la pagina non esiste)">acmite</a>), <i>Ns</i> (metasilicato di <a href="/wiki/Sodio" title="Sodio">sodio</a>) e <i>Ks</i> (metasilicato di <a href="/wiki/Potassio" title="Potassio">potassio</a>). </p> <div class="mw-heading mw-heading2"><h2 id="Origine">Origine</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Trachite&veaction=edit&section=3" title="Modifica la sezione Origine" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Trachite&action=edit&section=3" title="Edit section's source code: Origine"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>La trachite è associata ad ambiente non orogenico come isole vulcaniche non sull'asse delle dorsali e zone di sollevamento continentale e deriva da basalti alcalini per <a href="/wiki/Cristallizzazione_frazionata" title="Cristallizzazione frazionata">cristallizzazione frazionata</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Composizione_chimica_e_norma">Composizione chimica e norma</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Trachite&veaction=edit&section=4" title="Modifica la sezione Composizione chimica e norma" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Trachite&action=edit&section=4" title="Edit section's source code: Composizione chimica e norma"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Diagramma_TAS_2.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/b/b7/Diagramma_TAS_2.jpg/310px-Diagramma_TAS_2.jpg" decoding="async" width="310" height="262" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/b7/Diagramma_TAS_2.jpg/465px-Diagramma_TAS_2.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/b/b7/Diagramma_TAS_2.jpg 2x" data-file-width="550" data-file-height="465" /></a><figcaption>Classificazione chimica della trachite secondo il <a href="/wiki/TAS_(classificazione)" title="TAS (classificazione)">diagramma TAS</a></figcaption></figure> <style data-mw-deduplicate="TemplateStyles:r119427926">.mw-parser-output .responsive-columns{display:flex;flex-wrap:wrap;justify-content:space-between;margin-bottom:-20px}.mw-parser-output .responsive-columns>div{flex:1 1;margin:0 20px 20px 0}</style><div class="responsive-columns" style="width:auto;"> <div> <table class="wikitable"> <caption><span class="nowrap">Media di 534 analisi<sup id="cite_ref-dati_1-0" class="reference"><a href="#cite_note-dati-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup></span> </caption> <tbody><tr> <th></th> <th>% in peso </th></tr> <tr> <td>SiO<sub>2 </sub></td> <td align="right">62,31 </td></tr> <tr> <td>TiO<sub>2</sub></td> <td align="right">0,71 </td></tr> <tr> <td>Al<sub>2</sub>O<sub>3 </sub></td> <td align="right">17,276 </td></tr> <tr> <td>Fe<sub>2</sub>O<sub>3 </sub></td> <td align="right">3,04 </td></tr> <tr> <td>FeO</td> <td align="right">2,33 </td></tr> <tr> <td>MnO</td> <td align="right">0,15 </td></tr> <tr> <td>MgO</td> <td align="right">0,94 </td></tr> <tr> <td>CaO</td> <td align="right">2,38 </td></tr> <tr> <td>Na<sub>2</sub>O</td> <td align="right">5,57 </td></tr> <tr> <td>K<sub>2</sub>O</td> <td align="right">5,07 </td></tr> <tr> <td>P<sub>2</sub>O<sub>5 </sub></td> <td align="right">0,21 </td></tr></tbody></table> </div> <div> <table class="wikitable"> <caption><span class="nowrap"><a href="/wiki/Norma_(petrografia)" title="Norma (petrografia)">Minerali normativi</a><sup id="cite_ref-dati_1-1" class="reference"><a href="#cite_note-dati-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup></span> </caption> <tbody><tr> <th></th> <th>% in peso </th></tr> <tr> <td>Quarzo</td> <td align="right">5,00 </td></tr> <tr> <td>Ortoclasio</td> <td align="right">29,41 </td></tr> <tr> <td>Albite</td> <td align="right">46,26 </td></tr> <tr> <td>Anortite</td> <td align="right">7,05 </td></tr> <tr> <td>Nefelina</td> <td align="right">16,50 </td></tr> <tr> <td>Diopside</td> <td align="right">2,14 </td></tr> <tr> <td>Iperstene</td> <td align="right">2,06 </td></tr> <tr> <td>Magnetite</td> <td align="right">4,33 </td></tr> <tr> <td>Ilmenite</td> <td align="right">1,34 </td></tr> <tr> <td>Apatite</td> <td align="right">0,49 </td></tr></tbody></table> </div> </div> <div class="mw-heading mw-heading2"><h2 id="Distribuzione">Distribuzione</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Trachite&veaction=edit&section=5" title="Modifica la sezione Distribuzione" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Trachite&action=edit&section=5" title="Edit section's source code: Distribuzione"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In Italia: </p> <ul><li><a href="/wiki/Monte_Amiata" title="Monte Amiata">Monte Amiata</a> (<a href="/w/index.php?title=Abbadia_san_Salvatore&action=edit&redlink=1" class="new" title="Abbadia san Salvatore (la pagina non esiste)">Abbadia san Salvatore</a>)</li> <li><a href="/wiki/Colli_Euganei" title="Colli Euganei">Colli Euganei</a> (<a href="/wiki/Oligocene" title="Oligocene">Oligocene</a> inf.): Monte Lonzina, Colle della Rocca , Monte Rusta<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup></li> <li>Provincia magmatica del <a href="/wiki/Lazio" title="Lazio">Lazio</a> (<a href="/wiki/Quaternario" title="Quaternario">Quaternario</a>): stratovulcano di <a href="/wiki/Lago_di_Vico" title="Lago di Vico">Vico</a><sup id="cite_ref-Peccerillo_3-0" class="reference"><a href="#cite_note-Peccerillo-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup>, <a href="/wiki/Monte_Cimino" title="Monte Cimino">Monte Cimino</a></li> <li>Provincia magmatica campana (<a href="/wiki/Quaternario" title="Quaternario">Quaternario</a>): <a href="/wiki/Vesuvio" title="Vesuvio">Monte Somma-Vesuvio</a>, piroclastiti nei <a href="/wiki/Campi_Flegrei" title="Campi Flegrei">Campi Flegrei</a>, a <a href="/wiki/Isola_d%27Ischia" title="Isola d'Ischia">Ischia</a> e <a href="/wiki/Procida" title="Procida">Procida</a><sup id="cite_ref-Peccerillo_3-1" class="reference"><a href="#cite_note-Peccerillo-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup></li> <li><a href="/wiki/Isole_Ponziane" title="Isole Ponziane">Isole Ponziane</a> (<a href="/wiki/Quaternario" title="Quaternario">Quaternario</a>): colate, duomi e piroclastiti di trachiti potassiche<sup id="cite_ref-Peccerillo_3-2" class="reference"><a href="#cite_note-Peccerillo-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup></li> <li>Isola di <a href="/wiki/Vulcano" title="Vulcano">Vulcano</a> (<a href="/wiki/Quaternario" title="Quaternario">Quaternario</a>): Vulcanello (trachiti potassiche in colate e piroclastiti)<sup id="cite_ref-Peccerillo_3-3" class="reference"><a href="#cite_note-Peccerillo-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup></li> <li><a href="/wiki/Etna" title="Etna">Etna</a> (<a href="/wiki/Quaternario" title="Quaternario">Quaternario</a>)<sup id="cite_ref-Peccerillo_3-4" class="reference"><a href="#cite_note-Peccerillo-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup></li> <li><a href="/wiki/Ustica" title="Ustica">Ustica</a> (<a href="/wiki/Quaternario" title="Quaternario">Quaternario</a>): lave<sup id="cite_ref-Peccerillo_3-5" class="reference"><a href="#cite_note-Peccerillo-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup></li> <li><a href="/wiki/Pantelleria" title="Pantelleria">Pantelleria</a> (<a href="/wiki/Quaternario" title="Quaternario">Quaternario</a>): duomi e <a href="/wiki/Ignimbrite" title="Ignimbrite">ignimbriti</a><sup id="cite_ref-Peccerillo_3-6" class="reference"><a href="#cite_note-Peccerillo-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup></li> <li><a href="/wiki/Sardegna" title="Sardegna">Sardegna</a> (<a href="/wiki/Pliocene" title="Pliocene">Pliocene</a>): <a href="/wiki/Capo_Ferrato" title="Capo Ferrato">Capo Ferrato</a> (colate, filoni e duomi), <a href="/wiki/Montiferru" title="Montiferru">Montiferru</a><sup id="cite_ref-Peccerillo_3-7" class="reference"><a href="#cite_note-Peccerillo-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup></li></ul> <p>Nel mondo: </p> <ul><li><a href="/wiki/Alvernia" title="Alvernia">Alvernia</a>, <a href="/wiki/Renania" title="Renania">Renania</a> e <a href="/wiki/Scozia" title="Scozia">Scozia</a>, <a href="/wiki/Ungheria" title="Ungheria">Ungheria</a>, <a href="/wiki/Tahiti" title="Tahiti">Tahiti</a>, isole di <a href="/wiki/Isola_di_Ascensione" title="Isola di Ascensione">Ascensione</a> e <a href="/wiki/Sant%27Elena_(isola)" title="Sant'Elena (isola)">Sant'Elena</a>.</li></ul> <div class="mw-heading mw-heading2"><h2 id="Utilizzo">Utilizzo</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Trachite&veaction=edit&section=6" title="Modifica la sezione Utilizzo" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Trachite&action=edit&section=6" title="Edit section's source code: Utilizzo"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:K%C3%B6lner_Dom_von_Osten.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/0/0d/K%C3%B6lner_Dom_von_Osten.jpg/220px-K%C3%B6lner_Dom_von_Osten.jpg" decoding="async" width="220" height="346" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/0/0d/K%C3%B6lner_Dom_von_Osten.jpg/330px-K%C3%B6lner_Dom_von_Osten.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/0/0d/K%C3%B6lner_Dom_von_Osten.jpg/440px-K%C3%B6lner_Dom_von_Osten.jpg 2x" data-file-width="4589" data-file-height="7220" /></a><figcaption>Il <a href="/wiki/Duomo_di_Colonia" title="Duomo di Colonia">Duomo di Colonia</a>, realizzato in trachite del Drachenfels, nei <a href="/wiki/Siebengebirge" title="Siebengebirge">Siebengebirge</a>.</figcaption></figure> <figure class="mw-default-size mw-halign-left" typeof="mw:File/Thumb"><a href="/wiki/File:Orologio_in_trachite.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/e/e1/Orologio_in_trachite.jpg/150px-Orologio_in_trachite.jpg" decoding="async" width="150" height="157" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/e1/Orologio_in_trachite.jpg/225px-Orologio_in_trachite.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/e1/Orologio_in_trachite.jpg/300px-Orologio_in_trachite.jpg 2x" data-file-width="826" data-file-height="866" /></a><figcaption>Bassorilievo su quadrante d'orologio in trachite</figcaption></figure> <p>Questa roccia è commercializzata come materiale (lavorabile) per prodotti dell'<a href="/wiki/Edilizia" title="Edilizia">edilizia</a> e dell'<a href="/wiki/Arredo_urbano" title="Arredo urbano">arredo urbano</a>. Essa è presente in molti luoghi in Italia: da citare la <a href="/wiki/Sardegna" title="Sardegna">Sardegna</a> e, soprattutto, la zona dei <a href="/wiki/Colli_Euganei" title="Colli Euganei">Colli Euganei</a> (principalmente <a href="/wiki/Vo%27" title="Vo'">Vo'</a>, <a href="/wiki/Galzignano_Terme" title="Galzignano Terme">Galzignano Terme</a> e <a href="/wiki/Rovolon" title="Rovolon">Rovolon</a>) in provincia di Padova. Il termine trachite, nel settore della lavorazione, è tuttavia usato impropriamente per indicare genericamente pietre estratte da rocce effusive con struttura porfirica o microcristallina, come le <a href="/wiki/Ignimbrite" title="Ignimbrite">ignimbriti</a> e le <a href="/wiki/Andesite" title="Andesite">andesiti</a>. </p><p>La trachite fu usata in passato, e lo è tutt'oggi, prevalentemente per lastricati stradali, marciapiedi e bordature degli stessi. In tempi più recenti, grazie alle sue caratteristiche cromatiche ed alla possibilità di essere tagliata in lastre sottili e lucidata, si è resa adatta anche a scopi di rivestimento e di abbellimento di edifici, sia per esterni che per interni (scale e pavimenti). </p><p>L'opera di spicco che vide l'utilizzo della trachite è senza dubbio il grandioso <a href="/wiki/Duomo_di_Colonia" title="Duomo di Colonia">Duomo di Colonia</a>, una delle chiese più grandi della Cristianità. </p> <div class="mw-heading mw-heading2"><h2 id="Note">Note</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Trachite&veaction=edit&section=7" title="Modifica la sezione Note" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Trachite&action=edit&section=7" title="Edit section's source code: Note"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-dati-1"><span class="mw-cite-backlink"><b>^</b> <sup><i><a href="#cite_ref-dati_1-0">a</a></i></sup> <sup><i><a href="#cite_ref-dati_1-1">b</a></i></sup></span> <span class="reference-text">Myron G. Best, <i>Igneous and metamorphic petrology, 2nd edition</i> - Blackwell, 2003 pag. 20</span> </li> <li id="cite_note-2"><a href="#cite_ref-2"><b>^</b></a> <span class="reference-text"><cite class="citation web" style="font-style:normal"> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20170903173647/http://www.collieuganei.it/geologia/"><span style="font-style:italic;">Copia archiviata</span></a>, su <span style="font-style:italic;">collieuganei.it</span>. <small>URL consultato il 27 novembre 2017</small> <small>(archiviato dall'<abbr title="http://www.collieuganei.it/geologia/">url originale</abbr> il 3 settembre 2017)</small>.</cite></span> </li> <li id="cite_note-Peccerillo-3"><span class="mw-cite-backlink"><b>^</b> <sup><i><a href="#cite_ref-Peccerillo_3-0">a</a></i></sup> <sup><i><a href="#cite_ref-Peccerillo_3-1">b</a></i></sup> <sup><i><a href="#cite_ref-Peccerillo_3-2">c</a></i></sup> <sup><i><a href="#cite_ref-Peccerillo_3-3">d</a></i></sup> <sup><i><a href="#cite_ref-Peccerillo_3-4">e</a></i></sup> <sup><i><a href="#cite_ref-Peccerillo_3-5">f</a></i></sup> <sup><i><a href="#cite_ref-Peccerillo_3-6">g</a></i></sup> <sup><i><a href="#cite_ref-Peccerillo_3-7">h</a></i></sup></span> <span class="reference-text">Peccerillo A. - <i>Plio-Quaternary Volcanism in Italy -Petrology, Geochemistry, Geodynamics</i> - Springer (2005) - <a href="/wiki/Speciale:RicercaISBN/354025885X" class="internal mw-magiclink-isbn">ISBN 3-540-25885-X</a></span> </li> </ol></div> <div class="mw-heading mw-heading2"><h2 id="Bibliografia">Bibliografia</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Trachite&veaction=edit&section=8" title="Modifica la sezione Bibliografia" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Trachite&action=edit&section=8" title="Edit section's source code: Bibliografia"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><i>Censimento delle cave nei Colli Euganei</i>, effettuato nel 1983 dall'Ispettorato Ripartimentale delle Foreste di Vicenza.</li> <li>Scritti vari del professor Giampaolo De Vecchi, già professore ordinario di Mineralogia e Geologia all'Università di Padova.</li></ul> <div class="mw-heading mw-heading2"><h2 id="Voci_correlate">Voci correlate</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Trachite&veaction=edit&section=9" title="Modifica la sezione Voci correlate" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Trachite&action=edit&section=9" title="Edit section's source code: Voci correlate"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Taglio_della_pietra" title="Taglio della pietra">Taglio della pietra</a></li> <li><a href="/wiki/Roccia_magmatica" title="Roccia magmatica">Roccia magmatica</a></li> <li><a href="/wiki/Riolite" title="Riolite">Riolite</a></li> <li><a href="/wiki/Tufo" title="Tufo">Tufo</a></li> <li><a href="/wiki/Granito" title="Granito">Granito</a></li> <li><a href="/wiki/Trachite_euganea" title="Trachite euganea">Trachite euganea</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Altri_progetti">Altri progetti</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Trachite&veaction=edit&section=10" title="Modifica la sezione Altri progetti" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Trachite&action=edit&section=10" title="Edit section's source code: Altri progetti"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <div id="interProject" class="toccolours" style="display: none; clear: both; margin-top: 2em"><p id="sisterProjects" style="background-color: #efefef; color: black; font-weight: bold; margin: 0"><span>Altri progetti</span></p><ul title="Collegamenti verso gli altri progetti Wikimedia"> <li class="" title=""><span class="plainlinks" title="commons:Category:Trachyte"><a class="external text" href="https://commons.wikimedia.org/wiki/Category:Trachyte?uselang=it">Wikimedia Commons</a></span></li></ul></div> <ul><li><span typeof="mw:File"><a href="https://commons.wikimedia.org/wiki/?uselang=it" title="Collabora a Wikimedia Commons"><img alt="Collabora a Wikimedia Commons" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/18px-Commons-logo.svg.png" decoding="async" width="18" height="24" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/27px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/36px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></a></span> <span class="plainlinks"><a class="external text" href="https://commons.wikimedia.org/wiki/?uselang=it">Wikimedia Commons</a></span> contiene immagini o altri file su <b><span class="plainlinks"><a class="external text" href="https://commons.wikimedia.org/wiki/Category:Trachyte?uselang=it">trachite</a></span></b></li></ul> <div class="mw-heading mw-heading2"><h2 id="Collegamenti_esterni">Collegamenti esterni</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Trachite&veaction=edit&section=11" title="Modifica la sezione Collegamenti esterni" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Trachite&action=edit&section=11" title="Edit section's source code: Collegamenti esterni"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li class="mw-empty-elt"></li> <li><cite id="CITEREFBritannica.com" class="citation web" style="font-style:normal">(<span style="font-weight:bolder; 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