[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-612850-105":59,"doc-detail-612850-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","geological-time-periods-and-rock-strata-reading-worksheet","Geological Time Periods and Rock Strata - Reading Worksheet","","Geological Time Periods and Rock Strata explains how scientists study Earth’s history by examining rock layers and the fossils they contain. It focuses on the Phanerozoic Eon, outlining the Paleozoic, Mesozoic, and Cenozoic eras, then breaking each into periods and epochs such as the Cambrian, Jurassic, Cretaceous, and Holocene. The worksheet clarifies that strata classification depends on fossils, not rock types, and notes the general order of oldest rocks below and newest above, followed by practice questions.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":20,"@type":76,"position":81},"https://docshare.wps.com/document/exam/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/geological-time-periods-and-rock-strata-reading-worksheet/612850/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/geological-time-periods-and-rock-strata-reading-worksheet/612850.png","ImageObject",300,407,{"name":92,"@type":93},"Patrick","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-11-01","2026-10-19",true,{"@type":102,"interactionType":103,"userInteractionCount":81},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"Why do geologists focus on the Phanerozoic Eon?","Question",{"text":112,"@type":113},"Geologists focus on the Phanerozoic Eon because it is the eon during which the most life has existed on Earth. It began around 542 million years ago.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How are rock strata classified?",{"text":117,"@type":113},"Rock strata are classified according to the fossils they contain. They are not classified by the type of rocks (such as sandstone, limestone, or slate).",{"name":119,"@type":110,"acceptedAnswer":120},"What does fossil depth suggest about which fossil is older?",{"text":121,"@type":113},"In general, the oldest rocks (and fossils) are found in the bottom strata, and the newest rocks (and fossils) are found in the top strata. So a fossil found deeper in the Earth is likely older.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},612850,1792612060,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":19,"category_name":20,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":81,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":14,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":143,"read_time":24,"preview_page_count":4},549758146520,"https://ap-avatar.wpscdn.com/avatar/80002397d8c0411e94?_k=1775819394049821470","Geological Time Periods and Rock Strata  \nI) Phanerozoic Eon  \na. Paleozoic Era  \ni. Cambrian Period  \nii. Ordovician Period  \niii. Silurian Period  \niv. Devonian Period  \nv. Carboniferous Period  \nvi. Permian Period  \nb. Mesozoic Era  \ni. Triassic Period  \nii. Jurassic Period  \niii. Cretaceous Period  \nc. Cenozoic Era  \ni. Paleogene Period  \nii. Neogene Period  \niii. Quaternary Period  \n1. Pleistocene Epoch  \n2. Holocene Epoch  \nStrata (layers or segments of rock) are named according to the fossils they contain. Although life first appeared on Earth millions of years earlier, geologists (people who study the form and history of Earth) focus on the Phanerozoic Eon. This is because the Phanerozoic Eon, which began  \naround 542 million years ago, is the eon during which the most life has existed on Earth. By examining Earth’s rock strata, we can trace the history of life on Earth.  \n1. layers or segments of rock: [a. earth](a. earth)  \nb. geology  \nc. period  \nd. strata  \nThe Phanerozoic Eon is divided into three eras. From earliest to mostrecent, these three eras are the Paleozoic Era, the Mesozoic Era, and  \nthe Cenozoic Era. Each era is further divided into periods. For example, there are three periods in the Mesozoic Era; from first to last, these are the Cretaceous Period, the Jurassic Period, and the Triassic Period.  \n2. Which of the following is not a period of the Mesozoic Era?  \na. Cretaceous  \nb. Jurassic  \nc. Neogene  \nd. Triassic  \nEach period is further divided into epochs. For example, humans of today live in the Holocene Epoch. The Holocene Epoch reaches back to the end of the last Ice Age, about 12,000 years ago. Looking at the outline, one can see that the Holocene Epoch is part of the Quaternary Period, which is part of the Cenozoic Era.  \nNo one kind of rock makes up the strata of any particular era, period, or epoch. Sandstones, limestones, slates, etc., are found among the rocks of all ages. The strata are classified according to the fossils which they contain, and not according to the  \nvarieties of rock of which they are composed.  \nStrata—layers of rock—are laid down over time. Although different forces can move layers of rock around and jumble them up, for the most part, the oldest rocks (and fossils) are found in the bottom strata, and the newest rocks (and fossils) are found in the top strata.  \n3. Strata are classified according to the   which they contain.  \na. fossils  \nb. living things [c. rocks](c. rocks)[ ](c. rocks)[d. slates](d. slates)  \n4. Archosaurs appeared during the Triassic Period during the   Era.  \na. Cenozoic  \nb. Mesozoic  \nc. Paleozoic  \n5. Lorna digs and finds a fossil six feet below the earth. Dora digs and finds a fossil sixty feet below the earth. Whose fossil is most likely the oldest?","cbCaiolHsxJHIXp7","https://ap.wps.com/l/cbCaiolHsxJHIXp7","pdf",469041,"English","# Geological Time Periods and Rock Strata\n## Phanerozoic Eon and Its Eras\n## Periods and Epochs\n## How Strata Are Classified\n## Fossil Depth and Questions","[{\"question\":\"Why do geologists focus on the Phanerozoic Eon?\",\"answer\":\"Geologists focus on the Phanerozoic Eon because it is the eon during which the most life has existed on Earth. It began around 542 million years ago.\"},{\"question\":\"How are rock strata classified?\",\"answer\":\"Rock strata are classified according to the fossils they contain. They are not classified by the type of rocks (such as sandstone, limestone, or slate).\"},{\"question\":\"What does fossil depth suggest about which fossil is older?\",\"answer\":\"In general, the oldest rocks (and fossils) are found in the bottom strata, and the newest rocks (and fossils) are found in the top strata. So a fossil found deeper in the Earth is likely older.\"}]","Geological Time Periods and Rock Strata - Reading Worksheet | PDF",1792384284]