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<!DOCTYPE html> <html lang="en"> <head> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.css"> <link href="//cdnjs.cloudflare.com/ajax/libs/pnotify/2.0.0/pnotify.all.min.css" rel="stylesheet"> <script src="//ajax.googleapis.com/ajax/libs/jquery/2.0.3/jquery.min.js" type="text/javascript"></script> <link rel="stylesheet" href="/public/classic_css/autocomplete.css"> <meta charset="UTF-8"> <title>PBDB Interval</title>    <script src="/public/classic_js/autocomplete.js"></script> <script language="javascript" type="text/javascript"> var acapp = new AutoCompleteObject("searchbox", "cls", "classic"); document.addEventListener("DOMContentLoaded", acapp.initialize, false); function NewTab(doclink) { window.open( doclink, "_blank"); } </script> <style> .navbar-brand img { margin-top: -12px; } </style> </head> <body> <style> .nav > li > a { padding-left: 15px; padding-right: 10px } </style> <nav class="navbar navbar-inverse navbar-static-top" style="background-color: #000000" role="navigation"> <div class="container">  <div class="navbar-header"> <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#tgc-main-nav-collapse"> <span class="sr-only">Toggle navigation</span> MENU </button> <a class="navbar-brand" href="/"><img src="/public/images/logo_white.png" alt="PaleobioDB" title="PBDB Home"></a> </div> <div class="collapse navbar-collapse"> <ul class="nav navbar-nav"> <li><a href="/classic">Main Menu</a></li> <li class="dropdown"> <a href="#" class="dropdown-toggle" data-toggle="dropdown">About</a> <ul class="dropdown-menu"> <li class="dropdown"><a onclick="NewTab('https://escholarship.org/content/qt6tm05630/qt6tm05630.pdf?t=s0797i')">User Guide</a></li> <li><a onclick="NewTab('https://docs.google.com/document/d/e/2PACX-1vQPrlNL2sUTFbZAzZFs2Jhs4j-1h3RfAIFNl54JstnHfxhhRcjMGImGU4VRk89C9Er_kNEWj7NTAqaR/pub')">FAQ</a></li> <li><a onclick="NewTab('https://docs.google.com/document/d/e/2PACX-1vSa6qptD9Ox02NoD3pD5XreK0lh9P0JCxsHo1cpwV5My7HPh77vLYy6zjOqLPo0Gy09DKbAK3x69yMr/pub')">Recent Changes</a></li> <li><a onclick="NewTab('https://docs.google.com/document/d/e/2PACX-1vSMxYT8vGz-8UOZmwKyEgMfuSbbk52fW-oQDbUxdMwIMd8xjqaQvue_sJvvW5LewvPGC-aeQActioIL/pub')">Data Definitions</a></li> <li><a onclick="NewTab('https://docs.google.com/document/d/e/2PACX-1vRGNLWHekf_Pi2tfxfJeGvIAR3S3Z9BT6apmPQ-AGQhCHm0YB7AAwvSDh8F0bmrgeTO9LsB4Yw5IVsn/pub')">People</a></li> <li><a onclick="NewTab('https://docs.google.com/document/d/e/2PACX-1vTj4EvmyKBAMq-mbfa7_TFbZMyA-JCRJhAjiEY5IFjaiPcjBTPO1uU54iefy_OxalV188qbKa2FZP8c/pub')">Funding</a></li> <li><a onclick="NewTab('https://docs.google.com/document/d/e/2PACX-1vR7kG-nphQsmxW2tHX3yZkuahsZfQyXb3-5d8k088LDxwMM0RYlFbXM-m6ERWgm-bCNx8JKtiDsHPvu/pub')">Project Development</a></li> <li><a onclick="NewTab('/#/publications')">Official Publications</a></li> <li><a onclick="NewTab('https://docs.google.com/document/d/e/2PACX-1vTSim8NOagd9iBlfCHWofL-fH4hMfkHUqakfwryDT2VOBxoCYsSMbpDcUdjBb0996Xvv8Ka7m1lqgcP/pub')">Partner Organizations</a></li> <li><a onclick="NewTab('https://docs.google.com/document/d/178HwGVtA4--3SSFCN5Xx56P75BskCWCZVV_OHMVK0Ms/edit?usp=sharing')">Database Policies</a></li> <li><a onclick="NewTab('https://docs.google.com/document/d/e/2PACX-1vSeDBiPU9fgkK44R49Nj2WyhquPKU0F3G0uH1ezl9gNNq3cRyGHPdEvjpNtnuVwnXgscmoWru4zKUmx/pub')">Grant Writing Assistance</a></li> <li><a onclick="NewTab('https://docs.google.com/document/d/e/2PACX-1vQtrCtdl_7wOzAgm90__urKxgIMWLxC1hdA5Qh0rLozrnXteObSSWdXaAd9jSuJWfScHBXFvGACI6z5/pub')">Contact Us</a></li> </ul> </li> <li><a href="/classic/displayDownloadGenerator">Download</a></li> <li class="dropdown"> <a href="#" class="dropdown-toggle" data-toggle="dropdown">Search<b class="caret"></b></a> <ul class="dropdown-menu"> <li><a href="/classic/displaySearchColls?type=view">Fossil collection records</a></li> <li><a href="/classic/beginTaxonInfo">Fossil organisms</a></li> <li><a href="/classic/app/refs">Published references</a></li> <li><a href="/classic/classificationForm">Classifications of taxa in groups</a></li> <li><a href="/classic/displaySearchStrataForm">Stratigraphic units</a></li> <li><a href="/classic/app/archive/list">Data archives</a></li> </ul> </li> </ul> <ul class="nav navbar-nav navbar-right"> <li><a href="/account">Login</a></li> </ul> <form class="navbar-form navbar-input-group form-search universalSearchForm" onsubmit="return acapp.do_submit(this)"> <div class="input-group" id="acinput"> <input type="text" class="form-control" placeholder="Search the database" id="searchbox" onkeyup="acapp.do_keyup()"> <div class="searchResult dropdown-menu" style="display: none;"></div> </div> </form> </div> </div> </nav> <script language="javascript"> document.body.addEventListener("click", function (e) { acapp.showhide_menu(e); }); </script> <link rel="stylesheet" type="text/css" href="/public/classic_css/common.css">   <script src="/public/classic_js/common.js" language="JavaScript" type="text/javascript"></script> <div class="container"> <div id="mainBody"> <div class="innerMainPanel">  <link rel="stylesheet" href="/public/classic_css/timescales.css"> <script src="/public/classic_js/timescales.js"></script> <div onclick="closeDetails()"> <h3 class="ts_heading">Middle Cambrian <span class="ts_type">epoch</span></h3> <div id="details" class="ts_details"><p>509 - 497 Ma</p> <p>The definition of this interval in the timescale <a href="/classic/displayTimescale?scale=30">Cambrian Epochs</a> is taken from the following source:</p> <ul><li>F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. <i>A Geologic Time Scale 2004</i> 1-589 <a href="/classic/displayRefResults?reference_no=15443" target="_blank">view</a></li></ul> <p>There are intervals in 8 timescales which overlap this one. <a onclick="showOverlapList()">show</a></p> <ul class="ts_ovlist" id="ts_ovlist" style="display: none"> <li><em>International Chronostratigraphic Timescale:</em> <a href="/classic/displayTimescale?interval=Middle Cambrian,Guzhangian">Guzhangian</a> age, <a href="/classic/displayTimescale?interval=Middle Cambrian,Miaolingian">Miaolingian</a> epoch, <a href="/classic/displayTimescale?interval=Middle Cambrian,Wuliuan">Wuliuan</a> age, <a href="/classic/displayTimescale?interval=Middle Cambrian,Drumian">Drumian</a> age</li> <li><em>Obsolete Names for ICS Units:</em> <a href="/classic/displayTimescale?interval=Middle Cambrian,Series 3">Series 3</a> epoch, <a href="/classic/displayTimescale?interval=Middle Cambrian,Stage 5">Stage 5</a> age</li> <li><em>Cambrian of China:</em> <a href="/classic/displayTimescale?interval=Middle Cambrian,Wangcunian">Wangcunian</a> age, <a href="/classic/displayTimescale?interval=Middle Cambrian,Taijangian">Taijangian</a> age</li> <li><em>Cambrian of Australia:</em> <a href="/classic/displayTimescale?interval=Middle Cambrian,Boomerangian">Boomerangian</a> age, <a href="/classic/displayTimescale?interval=Middle Cambrian,Floran">Floran</a> age, <a href="/classic/displayTimescale?interval=Middle Cambrian,Undillan">Undillan</a> age, <a href="/classic/displayTimescale?interval=Middle Cambrian,Templetonian">Templetonian</a> age, <a href="/classic/displayTimescale?interval=Middle Cambrian,Mindyallan">Mindyallan</a> age, <a href="/classic/displayTimescale?interval=Middle Cambrian,Ordian">Ordian</a> age</li> <li><em>Cambrian of Siberia:</em> <a href="/classic/displayTimescale?interval=Middle Cambrian,Amgan">Amgan</a> age, <a href="/classic/displayTimescale?interval=Middle Cambrian,Ayusokkanian">Ayusokkanian</a> age, <a href="/classic/displayTimescale?interval=Middle Cambrian,Solvan">Solvan</a> age, <a href="/classic/displayTimescale?interval=Middle Cambrian,Mayan">Mayan</a> age, <a href="/classic/displayTimescale?interval=Middle Cambrian,Menevian">Menevian</a> age</li> <li><em>Cambrian of Kazakhstan:</em> <a href="/classic/displayTimescale?interval=Middle Cambrian,Zhanaarykian">Zhanaarykian</a> age, <a href="/classic/displayTimescale?interval=Middle Cambrian,Tuesaian">Tuesaian</a> age</li> <li><em>Cambrian of North America:</em> <a href="/classic/displayTimescale?interval=Middle Cambrian,Albertian">Albertian</a> age, <a href="/classic/displayTimescale?interval=Middle Cambrian,Topazan">Topazan</a> age, <a href="/classic/displayTimescale?interval=Middle Cambrian,Delamaran">Delamaran</a> age, <a href="/classic/displayTimescale?interval=Middle Cambrian,Marjumian">Marjumian</a> age</li> <li><em>Cambrian of West Avalonia:</em> <a href="/classic/displayTimescale?interval=Middle Cambrian,Arcadian">Arcadian</a> age</li> </ul> <p>This interval is used in the definition of <a href="/classic/displayCollResults?view=standard&timerule=defined&max_interval=Middle Cambrian" target="_blank">358 collections</a></p> <p>A total of <a href="/classic/displayCollResults?view=standard&timerule=major&max_interval=Middle Cambrian" target="_blank">2376 collections</a> with 13928 occurrences lie within this time span</p> <table><tr><td><p><a class="ts_expand" href="/classic/displayTimescale?interval=781&show=Phanerozoic">Show more time</a></p> </td><td><p><a class="ts_expand" id="ts_showtime" onclick="toggleTime()">Show linear time</a></p> </td></tr></table> </div> <div id="diagram" class="ts_panel"> <table class="ts_display" id="ts_diagram" onclick="selectInterval(event)"> <tr><th class="ts_header" colspan="3">International Chronostratigraphic Timescale</th><th class="ts_header">Cambrian Epochs</th><th class="ts_corner"></th></tr> <tr><td class="ts_interval" style="background-color: #7FA056" rowspan="10" id="s1-22">Cambrian</td><td class="ts_interval" style="background-color: #B3E095" rowspan="3" id="s1-780">Furongian</td><td class="ts_interval" style="background-color: #E6F5C9" id="s1-1112">Stage 10</td><td class="ts_interval" style="background-color: #FFFF33" rowspan="3" id="s30-1208">Late Cambrian</td><td class="ts_bound" id="b0"><span class="ts_boundlabel">485.4</span></td></tr> <tr><td class="ts_interval" style="background-color: #D9F0BB" id="s1-1113">Jiangshanian</td><td class="ts_bound" id="b1"><span class="ts_boundlabel">489.5</span></td></tr> <tr><td class="ts_interval" style="background-color: #CCEBAE" id="s1-1086">Paibian</td><td class="ts_bound" id="b2"><span class="ts_boundlabel">494</span></td></tr> <tr><td class="ts_interval" style="background-color: #A6CF86" rowspan="3" id="s1-1204">Miaolingian</td><td class="ts_interval" style="background-color: #CCDFAA" id="s1-1087">Guzhangian</td><td class="ts_interval ts_highlight" 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