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id="toc-Altri_progetti-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 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Disponibile in 24 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-24" 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">24 lingue</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-af mw-list-item"><a href="https://af.wikipedia.org/wiki/Tydsnede_(geologie)" title="Tydsnede (geologie) - afrikaans" lang="af" hreflang="af" data-title="Tydsnede (geologie)" data-language-autonym="Afrikaans" data-language-local-name="afrikaans" class="interlanguage-link-target"><span>Afrikaans</span></a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%AD%D9%8A%D9%86_(%D8%AC%D9%8A%D9%88%D9%84%D9%88%D8%AC%D9%8A%D8%A7)" title="حين (جيولوجيا) - arabo" lang="ar" hreflang="ar" data-title="حين (جيولوجيا)" 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%93%D0%B5%D0%B0%D0%BB%D0%B0%D0%B3%D1%96%D1%87%D0%BD%D1%8B_%D0%B2%D0%B5%D0%BA" title="Геалагічны век - bielorusso" lang="be" hreflang="be" data-title="Геалагічны век" data-language-autonym="Беларуская" data-language-local-name="bielorusso" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Doba_(geologija)" title="Doba (geologija) - bosniaco" lang="bs" hreflang="bs" data-title="Doba (geologija)" data-language-autonym="Bosanski" data-language-local-name="bosniaco" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-cy mw-list-item"><a href="https://cy.wikipedia.org/wiki/Oes_(daeareg)" title="Oes (daeareg) - gallese" lang="cy" hreflang="cy" data-title="Oes (daeareg)" data-language-autonym="Cymraeg" data-language-local-name="gallese" class="interlanguage-link-target"><span>Cymraeg</span></a></li><li class="interlanguage-link interwiki-en badge-Q70893996 mw-list-item" title=""><a href="https://en.wikipedia.org/wiki/Age_(geology)" title="Age (geology) - inglese" lang="en" hreflang="en" data-title="Age (geology)" data-language-autonym="English" data-language-local-name="inglese" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Edad_geol%C3%B3gica" title="Edad geológica - spagnolo" lang="es" hreflang="es" data-title="Edad geológica" 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/Iga_(geoloogia)" title="Iga (geoloogia) - estone" lang="et" hreflang="et" data-title="Iga (geoloogia)" data-language-autonym="Eesti" data-language-local-name="estone" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%B9%D8%B5%D8%B1_(%D8%B2%D9%85%DB%8C%D9%86%E2%80%8C%D8%B4%D9%86%D8%A7%D8%B3%DB%8C)" title="عصر (زمین‌شناسی) - persiano" lang="fa" hreflang="fa" data-title="عصر (زمین‌شناسی)" 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/Vaihe_(geologia)" title="Vaihe (geologia) - finlandese" lang="fi" hreflang="fi" data-title="Vaihe (geologia)" 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/%C3%82ge_g%C3%A9ologique" title="Âge géologique - francese" lang="fr" hreflang="fr" data-title="Âge géologique" data-language-autonym="Français" data-language-local-name="francese" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%AD%E0%A5%82%E0%A4%B5%E0%A5%88%E0%A4%9C%E0%A5%8D%E0%A4%9E%E0%A4%BE%E0%A4%A8%E0%A4%BF%E0%A4%95_%E0%A4%95%E0%A4%BE%E0%A4%B2" title="भूवैज्ञानिक काल - hindi" lang="hi" hreflang="hi" data-title="भूवैज्ञानिक काल" data-language-autonym="हिन्दी" data-language-local-name="hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Korszak_(f%C3%B6ldt%C3%B6rt%C3%A9net)" title="Korszak (földtörténet) - ungherese" lang="hu" hreflang="hu" data-title="Korszak (földtörténet)" data-language-autonym="Magyar" data-language-local-name="ungherese" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E6%9C%9F" title="期 - giapponese" lang="ja" hreflang="ja" data-title="期" 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%92%E1%83%94%E1%83%9D%E1%83%9A%E1%83%9D%E1%83%92%E1%83%98%E1%83%A3%E1%83%A0%E1%83%98_%E1%83%A1%E1%83%90%E1%83%A3%E1%83%99%E1%83%A3%E1%83%9C%E1%83%94" title="გეოლოგიური საუკუნე - georgiano" lang="ka" hreflang="ka" data-title="გეოლოგიური საუკუნე" 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/%D2%92%D0%B0%D1%81%D1%8B%D1%80_(%D0%93%D0%B5%D0%BE%D0%BB%D0%BE%D0%B3%D0%B8%D1%8F)" title="Ғасыр (Геология) - kazako" lang="kk" hreflang="kk" data-title="Ғасыр (Геология)" data-language-autonym="Қазақша" data-language-local-name="kazako" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-la mw-list-item"><a href="https://la.wikipedia.org/wiki/Aetas_(geologia)" title="Aetas (geologia) - latino" lang="la" hreflang="la" data-title="Aetas (geologia)" data-language-autonym="Latina" data-language-local-name="latino" class="interlanguage-link-target"><span>Latina</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Tijd_(geologie)" title="Tijd (geologie) - olandese" lang="nl" hreflang="nl" data-title="Tijd (geologie)" data-language-autonym="Nederlands" data-language-local-name="olandese" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Wiek_(geologia)" title="Wiek (geologia) - polacco" lang="pl" hreflang="pl" data-title="Wiek (geologia)" 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/Idade_geol%C3%B3gica" title="Idade geológica - portoghese" lang="pt" hreflang="pt" data-title="Idade geológica" 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/V%C3%A2rst%C4%83_(geologie)" title="Vârstă (geologie) - rumeno" lang="ro" hreflang="ro" data-title="Vârstă (geologie)" data-language-autonym="Română" data-language-local-name="rumeno" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%93%D0%B5%D0%BE%D0%BB%D0%BE%D0%B3%D1%96%D1%87%D0%BD%D0%B8%D0%B9_%D0%B2%D1%96%D0%BA" title="Геологічний вік - ucraino" lang="uk" hreflang="uk" data-title="Геологічний вік" data-language-autonym="Українська" data-language-local-name="ucraino" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/K%E1%BB%B3_(%C4%91%E1%BB%8Ba_ch%E1%BA%A5t)" title="Kỳ (địa chất) - vietnamita" lang="vi" hreflang="vi" data-title="Kỳ (địa chất)" data-language-autonym="Tiếng Việt" data-language-local-name="vietnamita" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E6%9C%9F_(%E5%9C%B0%E8%B4%A8%E5%AD%A6)" title="期 (地质学) - cinese" lang="zh" hreflang="zh" data-title="期 (地质学)" data-language-autonym="中文" data-language-local-name="cinese" class="interlanguage-link-target"><span>中文</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q568683#sitelinks-wikipedia" title="Modifica collegamenti interlinguistici" class="wbc-editpage">Modifica collegamenti</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Namespace"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a 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mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> Generale </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Speciale:PuntanoQui/Et%C3%A0_(geocronologia)" title="Elenco di tutte le pagine che sono collegate a questa [j]" accesskey="j"><span>Puntano qui</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Speciale:ModificheCorrelate/Et%C3%A0_(geocronologia)" rel="nofollow" title="Elenco delle ultime modifiche alle pagine collegate a questa [k]" accesskey="k"><span>Modifiche correlate</span></a></li><li id="t-specialpages" class="mw-list-item"><a href="/wiki/Speciale:PagineSpeciali" title="Elenco di tutte le pagine speciali [q]" accesskey="q"><span>Pagine speciali</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=Et%C3%A0_(geocronologia)&oldid=97651699" title="Collegamento permanente a questa versione di questa 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class="mw-content-ltr mw-parser-output" lang="it" dir="ltr"><table class="wikitable metadata noprint" style="float:right; font-size:90%; margin-left:5px"> <tbody><tr> <td colspan="4"><span style="float:right;"><span class="plainlinksneverexpand"><a class="external text" href="https://it.wikipedia.org/w/index.php?title=Template:Geologia-Paleobiologia&action=edit">m</a>  <a class="external text" href="https://it.wikipedia.org/w/index.php?title=Template:Geologia-Paleobiologia&action=history">c</a></span></span><div align="center"><span style="font-size:larger"><b><a href="/wiki/Scala_dei_tempi_geologici" title="Scala dei tempi geologici">Unità in stratigrafia e geocronologia</a></b></span><sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-ICS_chart_2-0" class="reference"><a href="#cite_note-ICS_chart-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup></div> </td></tr> <tr> <th><a href="/wiki/Unit%C3%A0_cronostratigrafica" title="Unità cronostratigrafica">Cronostratigrafiche</a> </th> <th><a href="/wiki/Unit%C3%A0_geocronologica" title="Unità geocronologica">Geocronologiche</a> </th> <th>Intervallo temporale (Ma = milioni di anni) </th></tr> <tr> <td><div align="center"><a href="/wiki/Eonotema" title="Eonotema">Eonotema</a></div></td> <td><div align="center"><a href="/wiki/Eone" title="Eone">Eone</a></div></td> <td>mezzo miliardo di anni </td></tr> <tr> <td><div align="center"><a href="/w/index.php?title=Eratema&action=edit&redlink=1" class="new" title="Eratema (la pagina non esiste)">Eratema</a></div></td> <td><div align="center"><a href="/wiki/Era_geologica" title="Era geologica">Era</a></div></td> <td>molte centinaia di <a href="/wiki/Annum" title="Annum">Ma</a> </td></tr> <tr> <td><div align="center"><a href="/w/index.php?title=Sistema_(stratigrafia)&action=edit&redlink=1" class="new" title="Sistema (stratigrafia) (la pagina non esiste)">Sistema</a></div></td> <td><div align="center"><a href="/wiki/Periodo_(geocronologia)" title="Periodo (geocronologia)">Periodo</a></div></td> <td>da 22 a 80 Ma </td></tr> <tr> <td><div align="center"><a href="/wiki/Serie_(stratigrafia)" title="Serie (stratigrafia)">Serie</a></div></td> <td><div align="center"><a href="/wiki/Epoca_geologica" title="Epoca geologica">Epoca</a></div></td> <td>decine di Ma </td></tr> <tr> <td><div align="center"><a href="/wiki/Piano_(geologia)" title="Piano (geologia)">Piano</a></div></td> <td><div align="center"><a class="mw-selflink selflink">Età</a></div></td> <td>da 2 a 10 Ma </td></tr> <tr> <td><div align="center"><a href="/wiki/Cronozona" title="Cronozona">Cronozona</a></div></td> <td><div align="center">Chron</div></td> <td>non usate nella scala ICS </td></tr></tbody></table> <p>Un'<b>età geologica</b> è un'<a href="/wiki/Unit%C3%A0_geocronologica" title="Unità geocronologica">unità geocronologica</a> utilizzata in <a href="/wiki/Geologia" title="Geologia">geologia</a>. È una delle suddivisioni della <a href="/wiki/Scala_dei_tempi_geologici" title="Scala dei tempi geologici">scala dei tempi geologici</a>; solitamente tra un'età e la successiva si registrano cambiamenti negli <a href="/wiki/Animale" class="mw-redirect" title="Animale">organismi superiori</a> con la comparsa o <a href="/wiki/Estinzione" title="Estinzione">scomparsa</a> di alcune <a href="/wiki/Famiglia_(tassonomia)" title="Famiglia (tassonomia)">famiglie</a>. </p><p>Un'età rappresenta il tempo trascorso durante la formazione delle rocce che costituiscono il <a href="/wiki/Piano_(geologia)" title="Piano (geologia)">piano</a> corrispondente. Un'età appartiene ad una determinata <a href="/wiki/Epoca_geologica" title="Epoca geologica">epoca</a> e normalmente non è suddivisa al suo interno in sottocategorie di rango inferiore. </p><p>Ogni età trova il suo corrispondente in un piano, ed ha una durata di alcuni milioni di anni.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> La datazione assoluta ha permesso di stabilire, in genere con un ridotto margine di errore, i valori in milioni di anni corrispondenti all'inizio e alla fine di ciascuna età. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Sviluppo_storico">Sviluppo storico</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Et%C3%A0_(geocronologia)&veaction=edit&section=1" title="Modifica la sezione Sviluppo storico" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Et%C3%A0_(geocronologia)&action=edit&section=1" title="Edit section's source code: Sviluppo storico"><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:Geologic_time_scale.gif" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/2/2c/Geologic_time_scale.gif/220px-Geologic_time_scale.gif" decoding="async" width="220" height="221" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/2c/Geologic_time_scale.gif/330px-Geologic_time_scale.gif 1.5x, //upload.wikimedia.org/wikipedia/commons/2/2c/Geologic_time_scale.gif 2x" data-file-width="398" data-file-height="400" /></a><figcaption></figcaption></figure> <p>Prima dell'introduzione delle età come suddivisioni temporali della storia della Terra, si erano riconosciute le tre divisioni principali del <a href="/wiki/Fanerozoico" title="Fanerozoico">Fanerozoico</a>, basate su registrazioni fossili e stratigrafiche, per le quali vennero proposti i nomi tuttora in vigore di <a href="/wiki/Paleozoico" title="Paleozoico">Paleozoico</a> (<a href="/wiki/Adam_Sedgwick" title="Adam Sedgwick">Sedgwick</a>, 1838), <a href="/wiki/Mesozoico" title="Mesozoico">Mesozoico</a> e <a href="/wiki/Cenozoico" title="Cenozoico">Cenozoico</a> (<a href="/wiki/John_Phillips_(geologo)" title="John Phillips (geologo)">Phillips</a>, 1841), intese come tappe successive e reali della storia della vita sul pianeta (fauna antica o era degli invertebrati e pesci; fauna intermedia o era dei rettili; fauna recente o era dei mammiferi). </p><p>I primi piani geologici furono stabiliti da <a href="/wiki/Alcide_d%27Orbigny" class="mw-redirect" title="Alcide d'Orbigny">Alcide d'Orbigny</a><sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> tra il 1849 e 1852, ma l'uso non era ancora invalso in modo chiaro tra gli studiosi del tempo a seconda del fatto che si riferissero alle stratificazioni rocciose o al tempo della loro formazione, concetti che differiscono a seconda della scuola di provenienza o del paese. Per evitare una possibile confusione, nel corso del II Congresso Geologico Internazionale del 1880 fu presa la decisione di distinguere i due sistemi di riferimento (roccia o tempo) introducendo la differenziazione tra piani e età, rispettivamente per le unità cronostatigrafiche e per quelle geologiche. </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=Et%C3%A0_(geocronologia)&veaction=edit&section=2" 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=Et%C3%A0_(geocronologia)&action=edit&section=2" 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-1"><a href="#cite_ref-1"><b>^</b></a> <span class="reference-text"><cite class="citation web" style="font-style:normal"> Guida italiana alla classificazione e alla terminologia stratigrafica, <a rel="nofollow" class="external text" href="http://www.isprambiente.gov.it/files/pubblicazioni/periodicitecnici/quaderni-sgi/quad9/cap8.pdf"><span style="font-style:italic;">Scheda sulle unità cronostratigrafiche</span></a> (<span style="font-weight: bolder; font-size:80%"><abbr title="documento in formato PDF">PDF</abbr></span>), su <span style="font-style:italic;">isprambiente.gov.it</span>. <small>URL consultato il 4 dicembre 2012</small>.</cite></span> </li> <li id="cite_note-ICS_chart-2"><a href="#cite_ref-ICS_chart_2-0"><b>^</b></a> <span class="reference-text"><cite class="citation web" style="font-style:normal"> <a rel="nofollow" class="external text" href="https://stratigraphy.org/chart"><span style="font-style:italic;">International Stratigraphic Chart</span></a>, su <span style="font-style:italic;">stratigraphy.org</span>, International Commission on Stratigraphy.</cite></span> </li> <li id="cite_note-3"><a href="#cite_ref-3"><b>^</b></a> <span class="reference-text">Commissione Internazionale di Statigrafia <a rel="nofollow" class="external text" href="http://www.stratigraphy.org/upload/bak/chron.htm">«Chapter 9. Chronostratigraphic Units»</a>. <i>International stratigraphic guide</i>.</span> </li> <li id="cite_note-4"><a href="#cite_ref-4"><b>^</b></a> <span class="reference-text">Alcide d'Orbigny, <i>Cours élémentaire de paléontologie et de géologie stratigraphiques</i>, 1146 p., 628 fig. (3 vol.).</span> </li> <li id="cite_note-5"><a href="#cite_ref-5"><b>^</b></a> <span class="reference-text">Alcide d'Orbigny, <i>Prodrome de paléontologie stratigraphique universelle des animaux mollusques et rayonnés fossiles</i>. Masson, Paris. 1017 p. (3 vol.)</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=Et%C3%A0_(geocronologia)&veaction=edit&section=3" 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=Et%C3%A0_(geocronologia)&action=edit&section=3" title="Edit section's source code: Bibliografia"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li>Alcide d'Orbigny, <i>Cours élémentaire de paléontologie et de géologie stratigraphiques</i>, 1146 p., 628 figs. (3 vol.), 1849-1852.</li> <li>Alcide d'Orbigny, <i>Prodrome de paléontologie stratigraphique universelle des animaux mollusques et rayonnés fossiles</i>. Masson, Paris. 1017 p. (3 vol.), 1850-1852. <ul><li>volume 1: (<a rel="nofollow" class="external text" href="http://gallica.bnf.fr/ark:/12148/bpt6k29159g">on line</a>)</li> <li>volume 2: (<a rel="nofollow" class="external text" href="http://gallica.bnf.fr/ark:/12148/bpt6k29160p">on line</a>)</li> <li>volume 3: (<a rel="nofollow" class="external text" href="http://gallica.bnf.fr/ark:/12148/bpt6k291611">on line</a>)</li></ul></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=Et%C3%A0_(geocronologia)&veaction=edit&section=4" 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=Et%C3%A0_(geocronologia)&action=edit&section=4" 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/Scala_dei_tempi_geologici" title="Scala dei tempi geologici">Scala dei tempi geologici</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=Et%C3%A0_(geocronologia)&veaction=edit&section=5" 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=Et%C3%A0_(geocronologia)&action=edit&section=5" 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; 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Usa l'anteprima prima di salvare">M</span></a></div></div><span class="navbox_title"><a href="/wiki/Cronologia" title="Cronologia"><span style="color:#2f4f4f">Cronologia universale</span></a></span></th></tr><tr><th colspan="1" class="navbox_group" style="background:#add8e6">Divisioni temporali calendariali</th><td colspan="1" class="navbox_list navbox_odd"><a href="/wiki/Settimana" title="Settimana">Settimana</a><b> ·</b> <a href="/wiki/Mese" title="Mese">Mese</a><b> ·</b> <a href="/wiki/Mese_sinodico" title="Mese sinodico">Mese sinodico</a><b> ·</b> <a href="/wiki/Anno_lunare" title="Anno lunare">Anno lunare</a><b> ·</b> <a href="/wiki/Anno_ordinario" title="Anno ordinario">Anno ordinario</a><b> ·</b> <a href="/wiki/Anno_bisestile" title="Anno bisestile">Anno bisestile</a><b> ·</b> <a href="/wiki/Octaeteride" title="Octaeteride">Octaeteride</a><b> ·</b> <a href="/wiki/Ciclo_metonico" title="Ciclo metonico">Ciclo metonico</a><b> ·</b> <a href="/wiki/Ciclo_callippico" title="Ciclo callippico">Ciclo callippico</a><b> ·</b> <a href="/wiki/Intercalazione_(cronologia)" title="Intercalazione (cronologia)">Intercalazione (cronologia)</a><b> ·</b></td></tr><tr><th colspan="1" class="navbox_group" style="background:#add8e6">Calendari</th><td colspan="1" class="navbox_list navbox_even"><table class="subnavbox"><tbody><tr><th class="subnavbox_group" style="background:#afeeee">Tipi</th><td colspan="1"><a href="/wiki/Calendario" title="Calendario">Calendario</a><b> ·</b> <a href="/wiki/Calendario_lunare" title="Calendario lunare">Lunare</a><b> ·</b> <a href="/wiki/Calendario_solare" title="Calendario solare">Solare</a><b> ·</b> <a href="/wiki/Calendario_lunisolare" title="Calendario lunisolare">Lunisolare</a><b> ·</b> <a href="/wiki/Calendario_delle_settimane" title="Calendario delle settimane">Calendario delle settimane</a><b> ·</b> <a href="/wiki/Calendario_pentecontale" title="Calendario pentecontale">Calendario pentecontale</a></td></tr><tr><th class="subnavbox_group" style="background:#afeeee">Pre-giuliano e giuliano</th><td colspan="1"><a href="/wiki/Calendario_romano" title="Calendario romano">Calendario romano o pre-giuliano</a><b> ·</b> <a href="/wiki/Calendario_giuliano" title="Calendario giuliano">Calendario giuliano</a><b> ·</b> <a href="/wiki/Calendario_giuliano#Calendario_giuliano_prolettico" title="Calendario giuliano">Calendario giuliano prolettico</a><b> ·</b> <a href="/wiki/Ciclo_solare_(calendario)" title="Ciclo solare (calendario)">Ciclo solare</a><b> ·</b> <a href="/wiki/Lettera_dominicale" title="Lettera dominicale">Lettera dominicale</a></td></tr><tr><th class="subnavbox_group" style="background:#afeeee">Gregoriano</th><td colspan="1"><a href="/wiki/Calendario_gregoriano" title="Calendario gregoriano">Gregoriano</a><b> ·</b> <a href="/wiki/Calendario_gregoriano_prolettico" title="Calendario gregoriano prolettico">Gregoriano prolettico</a><b> ·</b> <a href="/wiki/Formato_della_data_per_stato" title="Formato della data per stato">Formato della data per stato</a><b> ·</b> <a href="/w/index.php?title=Date_Old_Style_e_New_Style&action=edit&redlink=1" class="new" title="Date Old Style e New Style (la pagina non esiste)">Date Old Style e New Style</a></td></tr><tr><th class="subnavbox_group" style="background:#afeeee">In base ai nomi di civiltà</th><td colspan="1"><a href="/wiki/Calendario_cinese" title="Calendario cinese">Calendario cinese</a><b> ·</b> <a href="/wiki/Calendario_giapponese" title="Calendario giapponese">Calendario giapponese</a><b> ·</b> <a href="/w/index.php?title=Calendario_coreano&action=edit&redlink=1" class="new" title="Calendario coreano (la pagina non esiste)">Calendario coreano</a><b> ·</b> <a href="/w/index.php?title=Calendario_vietnamita&action=edit&redlink=1" class="new" title="Calendario vietnamita (la pagina non esiste)">Calendario vietnamita</a><b> ·</b> <a href="/wiki/Calendario_ebraico" title="Calendario ebraico">Calendario ebraico</a><b> ·</b> <a href="/wiki/Calendario_islamico" title="Calendario islamico">Calendario islamico</a><b> ·</b> <a href="/wiki/Calendario_maya" title="Calendario maya">Calendario maya</a></td></tr><tr><th class="subnavbox_group" style="background:#afeeee">Altri</th><td colspan="1"><a href="/wiki/ISO_8601" title="ISO 8601">ISO 8601</a><b> ·</b> <a href="/wiki/Calendario_rivoluzionario_francese" title="Calendario rivoluzionario francese">Calendario rivoluzionario francese</a><b> ·</b> <a href="/wiki/Calendario_rivoluzionario_sovietico" title="Calendario rivoluzionario sovietico">Calendario rivoluzionario sovietico</a><b> ·</b> <a href="/wiki/Ciclo_sessagesimale" class="mw-redirect" title="Ciclo sessagesimale">Ciclo sessagesimale</a><b> ·</b> <a href="/wiki/Calendario_geologico" title="Calendario geologico">Calendario geologico</a></td></tr></tbody></table></td></tr><tr><th colspan="1" class="navbox_group" style="background:#add8e6"><a href="/wiki/Era_del_calendario" title="Era del calendario">Ere</a> e <a href="/wiki/Primo_giorno_dell%27anno" title="Primo giorno dell'anno">stili</a> di datazione</th><td colspan="1" class="navbox_list navbox_odd"><table class="subnavbox"><tbody><tr><th class="subnavbox_group" style="background:#afeeee">In base alle <a href="/wiki/Epoca_(calendario)" title="Epoca (calendario)">epoche</a></th><td colspan="1"><a href="/wiki/Anno_Mundi" title="Anno Mundi">Anno Mundi</a><b> ·</b> <a href="/wiki/Calendario_bizantino" title="Calendario bizantino">Epoca bizantina</a><b> ·</b> <a href="/wiki/Ab_incarnatione" class="mw-redirect" title="Ab incarnatione">Ab incarnatione</a><b> ·</b> <a href="/wiki/Ab_Urbe_condita" title="Ab Urbe condita">Ab Urbe condita</a><b> ·</b> <a href="/wiki/Era_seleucide" title="Era seleucide">Era seleucide</a><b> ·</b> <a href="/wiki/Anno_Domini" title="Anno Domini">Anno Domini</a><b> ·</b> <a href="/wiki/Era_volgare" title="Era volgare">Era volgare</a><b> ·</b> <a href="/wiki/Era_ispanica" title="Era ispanica">Era ispanica</a><b> ·</b> <a href="/wiki/Before_Present" title="Before Present">Before Present</a><b> ·</b> <a href="/wiki/Era_olocenica" title="Era olocenica">Era olocenica</a><b> ·</b> <a href="/wiki/Calendario_islamico" title="Calendario islamico">Islamica</a><b> ·</b> <a href="/wiki/Calendario_egizio" title="Calendario egizio">Egizia</a><b> ·</b> <a href="/wiki/Ciclo_sotiaco" title="Ciclo sotiaco">Ciclo sotiaco</a><b> ·</b> <a href="/wiki/Yuga" title="Yuga">Hindu Yuga</a></td></tr><tr><th class="subnavbox_group" style="background:#afeeee">Per <a href="/wiki/Eponimo" title="Eponimo">eponimi</a> o per anni di regno</th><td colspan="1"><a href="/wiki/Console_(storia_romana)" title="Console (storia romana)">Anni consolari</a><b> ·</b> <a href="/wiki/Canone_di_Tolomeo" title="Canone di Tolomeo">Canone di Tolomeo</a><b> ·</b> <a href="/wiki/Libri_dei_Re" title="Libri dei Re">Libri dei Re</a><b> ·</b> <a href="/wiki/Limmu" title="Limmu">Limmu</a><b> ·</b> <a href="/wiki/Dinastia_seleucide" title="Dinastia seleucide">Dinastia seleucide</a><b> ·</b> <a href="/wiki/Ni%C3%A1nh%C3%A0o" title="Niánhào">Ere della Cina</a><b> ·</b> <a href="/wiki/Ere_del_Giappone" title="Ere del Giappone">Ere del Giappone</a></td></tr></tbody></table></td></tr><tr><th colspan="1" class="navbox_group" style="background:#add8e6">Tempo astronomico</th><td colspan="1" class="navbox_list navbox_even"><a href="/wiki/Tempo" title="Tempo">Tempo</a><b> ·</b> <a href="/wiki/Effemeridi" title="Effemeridi">Effemeridi</a><b> ·</b> <a href="/wiki/Cronologia_astronomica" title="Cronologia astronomica">Datazione astronomica</a><b> ·</b> <a href="/wiki/Anno_galattico" title="Anno galattico">Anno galattico</a><b> ·</b> <a href="/wiki/Anno_platonico" title="Anno platonico">Anno platonico</a><b> ·</b> <a href="/wiki/Cicli_di_Milankovi%C4%87" title="Cicli di Milanković">Cicli di Milanković</a><b> ·</b> <a href="/wiki/Calendario_cosmico" title="Calendario cosmico">Calendario cosmico</a></td></tr><tr><th colspan="1" class="navbox_group" style="background:#add8e6">Tempo geologico</th><td colspan="1" class="navbox_list navbox_odd"><table class="subnavbox"><tbody><tr><th class="subnavbox_group" style="background:#afeeee">Concetti</th><td colspan="1"><a href="/wiki/Scala_dei_tempi_geologici" title="Scala dei tempi geologici">Tempo profondo</a><b> ·</b> <a href="/wiki/Storia_della_Terra" title="Storia della Terra">Storia geologica della terra</a><b> ·</b> <a href="/wiki/Scala_dei_tempi_geologici" title="Scala dei tempi geologici">Scala dei tempi geologici</a></td></tr><tr><th class="subnavbox_group" style="background:#afeeee">Standards</th><td colspan="1"><a href="/wiki/Et%C3%A0_stratigrafiche_globali_standard" title="Età stratigrafiche globali standard">Età stratigrafiche globali standard</a> (sigla GSSA)<b> ·</b> <a href="/wiki/GSSP" title="GSSP">Sezioni e punti stratigrafici globali</a> (sigla <a href="/wiki/GSSP" title="GSSP">GSSP</a>)</td></tr><tr><th class="subnavbox_group" style="background:#afeeee">Metodi</th><td colspan="1"><a href="/wiki/Cronostratigrafia" title="Cronostratigrafia">Cronostratigrafia</a><b> ·</b> <a href="/wiki/Periodo_(geocronologia)" title="Periodo (geocronologia)">Periodo (geocronologia)</a><b> ·</b> <a class="mw-selflink selflink">Età (geocronologia)</a><b> ·</b> <a href="/wiki/Geochimica_isotopica" title="Geochimica isotopica">Geochimica isotopica</a><b> ·</b> <a href="/wiki/Legge_della_sovrapposizione" title="Legge della sovrapposizione">Legge della sovrapposizione</a><b> ·</b> <a href="/wiki/Datazione_samario-neodimio" title="Datazione samario-neodimio">Datazione samario-neodimio</a><b> ·</b> <a href="/wiki/Termoluminescenza" title="Termoluminescenza">Termoluminescenza</a></td></tr></tbody></table></td></tr><tr><th colspan="1" class="navbox_group" style="background:#add8e6">Metodi archeologici</th><td colspan="1" class="navbox_list navbox_even"><table class="subnavbox"><tbody><tr><th class="subnavbox_group" style="background:#afeeee"><a href="/wiki/Datazione_assoluta" title="Datazione assoluta">Datazione assoluta</a></th><td colspan="1"><a href="/wiki/Racemizzazione_degli_amminoacidi" title="Racemizzazione degli amminoacidi">Racemizzazione degli amminoacidi</a><b> ·</b> <a href="/wiki/Archeomagnetismo" title="Archeomagnetismo">Archeomagnetismo</a><b> ·</b> <a href="/wiki/Dendrocronologia" title="Dendrocronologia">Dendrocronologia</a><b> ·</b> <a href="/wiki/Glottocronologia" title="Glottocronologia">Glottocronologia</a><b> ·</b> <a href="/wiki/Carota_di_ghiaccio" title="Carota di ghiaccio">Carota di ghiaccio</a><b> ·</b> <a href="/wiki/Lichenometria" title="Lichenometria">Lichenometria</a><b> ·</b> <a href="/wiki/Paleomagnetismo" title="Paleomagnetismo">Paleomagnetismo</a><b> ·</b> <a href="/wiki/Metodo_del_carbonio-14" title="Metodo del carbonio-14">Datazione al radiocarbonio</a><b> ·</b> <a href="/wiki/Datazione_radiometrica" title="Datazione radiometrica">Datazione radiometrica</a><b> ·</b> <a href="/wiki/Tefrocronologia" title="Tefrocronologia">Tefrocronologia</a><b> ·</b> <a href="/wiki/Datazione_a_termoluminescenza" title="Datazione a termoluminescenza">Datazione a termoluminescenza</a><b> ·</b> <a href="/wiki/Metodo_di_datazione_uranio-piombo" title="Metodo di datazione uranio-piombo">Datazione uranio-piombo</a></td></tr><tr><th class="subnavbox_group" style="background:#afeeee">Datazione relativa</th><td colspan="1"><a href="/wiki/Datazione_per_assorbimento_del_fluoro" title="Datazione per assorbimento del fluoro">Datazione per assorbimento del fluoro</a><b> ·</b> <a href="/wiki/Idratazione_dell%27ossidiana" title="Idratazione dell'ossidiana">Idratazione dell'ossidiana</a><b> ·</b> <a href="/wiki/Seriazione_cronologica" title="Seriazione cronologica">Seriazione cronologica</a><b> ·</b> <a href="/wiki/Stratigrafia_(archeologia)" title="Stratigrafia (archeologia)">Stratigrafia (archeologia)</a><b> ·</b> <a href="/wiki/Datazione_isocrona" title="Datazione isocrona">Datazione isocrona</a><b> ·</b> <a href="/wiki/Datazione_rubidio-stronzio" title="Datazione rubidio-stronzio">Datazione rubidio-stronzio</a><b> ·</b> <a href="/wiki/Datazione_argon-argon" title="Datazione argon-argon">Datazione argon-argon</a><b> ·</b> <a href="/wiki/Datazione_uranio-torio" title="Datazione uranio-torio">Datazione uranio-torio</a><b> ·</b> <a href="/wiki/Datazione_con_azoto" title="Datazione con azoto">Datazione con azoto</a></td></tr></tbody></table></td></tr><tr><th colspan="1" class="navbox_group" style="background:#add8e6">Metodo genetico</th><td colspan="1" class="navbox_list navbox_odd"><a href="/wiki/Orologio_molecolare" title="Orologio molecolare">Orologio molecolare</a></td></tr><tr><th colspan="1" class="navbox_group" style="background:#add8e6">Argomenti correlati</th><td colspan="1" class="navbox_list navbox_even"><a href="/wiki/Cronaca_(genere_letterario)" title="Cronaca (genere letterario)">Cronaca (genere letterario)</a><b> ·</b> <a href="/wiki/Nuova_cronologia" title="Nuova cronologia">Nuova cronologia</a><b> ·</b> <a href="/wiki/Periodizzazione" title="Periodizzazione">Periodizzazione</a><b> ·</b> <a href="/w/index.php?title=Synchronoptic_view&action=edit&redlink=1" class="new" title="Synchronoptic view (la pagina non esiste)">Synchronoptic view</a><b> ·</b> <a href="/wiki/Anno_0" class="mw-redirect" title="Anno 0">Anno 0</a><b> ·</b> <a href="/wiki/Terminus_post_quem" title="Terminus post quem">Terminus post quem</a><b> ·</b> <a href="/w/index.php?title=Cronologia_ASPRO&action=edit&redlink=1" class="new" title="Cronologia ASPRO (la pagina non esiste)">Cronologia ASPRO</a></td></tr><tr><th colspan="1" class="navbox_group" style="background:#add8e6">Basi cronologiche</th><td colspan="1" class="navbox_list navbox_odd"><a href="/wiki/Astronomia" title="Astronomia">Astronomia</a><b> ·</b> <a href="/wiki/Geologia" title="Geologia">Geologia</a><b> ·</b> <a href="/wiki/Paleontologia" 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