{"id":314,"date":"2021-01-20T15:49:46","date_gmt":"2021-01-20T20:49:46","guid":{"rendered":"https:\/\/pressbooks.bccampus.ca\/earthhistorylab\/?post_type=chapter&#038;p=314"},"modified":"2021-02-08T10:21:49","modified_gmt":"2021-02-08T15:21:49","slug":"exercise-3-2-reconstructing-relative-geological-time","status":"publish","type":"chapter","link":"https:\/\/pressbooks.bccampus.ca\/earthhistorylab\/chapter\/exercise-3-2-reconstructing-relative-geological-time\/","title":{"raw":"Exercise 3.2. Reconstructing Relative Geological Time","rendered":"Exercise 3.2. Reconstructing Relative Geological Time"},"content":{"raw":"<h1>What To Do<\/h1>\r\nFigure 3.3 is a geologic cross-section where each rock unit is assigned a letter as a label. Use the labels in Figure 3.3 and the <a href=\"https:\/\/pressbooks.bccampus.ca\/earthhistorylab\/chapter\/part-i-relative-time-stratigraphy\/#stratprinc\" target=\"_blank\" rel=\"noopener noreferrer\">stratigraphic principles<\/a> to answer the questions that follow. These questions are included in the Lab 3 worksheets.\r\n\r\nAll rocks are sedimentary except for the following:\r\n<ul>\r\n \t<li>H: metamorphic<\/li>\r\n \t<li>P and S: intrusive igneous rocks<\/li>\r\n<\/ul>\r\n<div class=\"textbox shaded\">In the questions below, the term \"geological event\" could mean the formation of a particular rock unit (e.g., bed X is a geological event) or the development of a geological structure such as a fault.<\/div>\r\n&nbsp;\r\n\r\n&nbsp;\r\n\r\n[caption id=\"attachment_317\" align=\"alignnone\" width=\"980\"]<img class=\"size-full wp-image-317\" src=\"https:\/\/pressbooks.bccampus.ca\/earthhistorylab\/wp-content\/uploads\/sites\/1224\/2021\/01\/F3-3.png\" alt=\"\" width=\"980\" height=\"600\" \/> <strong>Figure 3.3 |<\/strong> Geological cross-section for reconstructing relative time.[\/caption]\r\n\r\n&nbsp;\r\n<p class=\"hanging-indent\">1. Which is the oldest geologic event?<\/p>\r\n<p class=\"hanging-indent\">2. Which geologic events are definitely older than the intrusion <span style=\"color: #800000\"><strong>S<\/strong><\/span>?<\/p>\r\n<p class=\"hanging-indent\">3. What stratigraphic principle is used to date <span style=\"color: #800000\"><strong>Fault B<\/strong><\/span> on the right side of the figure?<\/p>\r\n<p class=\"hanging-indent\">4. Which pairs of rock layers define unconformities?<\/p>\r\n<p style=\"padding-left: 40px\"><em><span style=\"color: #800000\">Note: Once you find the unconformities, mark each by making the contacts thicker, or by using a coloured pencil. This will help you to answer question 6.<\/span><\/em><\/p>\r\n<p class=\"hanging-indent\">5. Which is the most recent (youngest) geological event in the cross section above?<\/p>\r\n<p class=\"hanging-indent\">6. List the rock units and the faults in order from the oldest to the youngest. Use the letter <em>A<\/em> to refer to Fault A, and <em>B<\/em> to refer to Fault B.<\/p>","rendered":"<h1>What To Do<\/h1>\n<p>Figure 3.3 is a geologic cross-section where each rock unit is assigned a letter as a label. Use the labels in Figure 3.3 and the <a href=\"https:\/\/pressbooks.bccampus.ca\/earthhistorylab\/chapter\/part-i-relative-time-stratigraphy\/#stratprinc\" target=\"_blank\" rel=\"noopener noreferrer\">stratigraphic principles<\/a> to answer the questions that follow. These questions are included in the Lab 3 worksheets.<\/p>\n<p>All rocks are sedimentary except for the following:<\/p>\n<ul>\n<li>H: metamorphic<\/li>\n<li>P and S: intrusive igneous rocks<\/li>\n<\/ul>\n<div class=\"textbox shaded\">In the questions below, the term &#8220;geological event&#8221; could mean the formation of a particular rock unit (e.g., bed X is a geological event) or the development of a geological structure such as a fault.<\/div>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<figure id=\"attachment_317\" aria-describedby=\"caption-attachment-317\" style=\"width: 980px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-317\" src=\"https:\/\/pressbooks.bccampus.ca\/earthhistorylab\/wp-content\/uploads\/sites\/1224\/2021\/01\/F3-3.png\" alt=\"\" width=\"980\" height=\"600\" srcset=\"https:\/\/pressbooks.bccampus.ca\/earthhistorylab\/wp-content\/uploads\/sites\/1224\/2021\/01\/F3-3.png 980w, https:\/\/pressbooks.bccampus.ca\/earthhistorylab\/wp-content\/uploads\/sites\/1224\/2021\/01\/F3-3-300x184.png 300w, https:\/\/pressbooks.bccampus.ca\/earthhistorylab\/wp-content\/uploads\/sites\/1224\/2021\/01\/F3-3-768x470.png 768w, https:\/\/pressbooks.bccampus.ca\/earthhistorylab\/wp-content\/uploads\/sites\/1224\/2021\/01\/F3-3-65x40.png 65w, https:\/\/pressbooks.bccampus.ca\/earthhistorylab\/wp-content\/uploads\/sites\/1224\/2021\/01\/F3-3-225x138.png 225w, https:\/\/pressbooks.bccampus.ca\/earthhistorylab\/wp-content\/uploads\/sites\/1224\/2021\/01\/F3-3-350x214.png 350w\" sizes=\"auto, (max-width: 980px) 100vw, 980px\" \/><figcaption id=\"caption-attachment-317\" class=\"wp-caption-text\"><strong>Figure 3.3 |<\/strong> Geological cross-section for reconstructing relative time.<\/figcaption><\/figure>\n<p>&nbsp;<\/p>\n<p class=\"hanging-indent\">1. Which is the oldest geologic event?<\/p>\n<p class=\"hanging-indent\">2. Which geologic events are definitely older than the intrusion <span style=\"color: #800000\"><strong>S<\/strong><\/span>?<\/p>\n<p class=\"hanging-indent\">3. What stratigraphic principle is used to date <span style=\"color: #800000\"><strong>Fault B<\/strong><\/span> on the right side of the figure?<\/p>\n<p class=\"hanging-indent\">4. Which pairs of rock layers define unconformities?<\/p>\n<p style=\"padding-left: 40px\"><em><span style=\"color: #800000\">Note: Once you find the unconformities, mark each by making the contacts thicker, or by using a coloured pencil. This will help you to answer question 6.<\/span><\/em><\/p>\n<p class=\"hanging-indent\">5. Which is the most recent (youngest) geological event in the cross section above?<\/p>\n<p class=\"hanging-indent\">6. List the rock units and the faults in order from the oldest to the youngest. Use the letter <em>A<\/em> to refer to Fault A, and <em>B<\/em> to refer to Fault B.<\/p>\n","protected":false},"author":1019,"menu_order":3,"template":"","meta":{"pb_show_title":"on","pb_short_title":"","pb_subtitle":"","pb_authors":[],"pb_section_license":""},"chapter-type":[48],"contributor":[],"license":[],"class_list":["post-314","chapter","type-chapter","status-publish","hentry","chapter-type-numberless"],"part":161,"_links":{"self":[{"href":"https:\/\/pressbooks.bccampus.ca\/earthhistorylab\/wp-json\/pressbooks\/v2\/chapters\/314","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pressbooks.bccampus.ca\/earthhistorylab\/wp-json\/pressbooks\/v2\/chapters"}],"about":[{"href":"https:\/\/pressbooks.bccampus.ca\/earthhistorylab\/wp-json\/wp\/v2\/types\/chapter"}],"author":[{"embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/earthhistorylab\/wp-json\/wp\/v2\/users\/1019"}],"version-history":[{"count":6,"href":"https:\/\/pressbooks.bccampus.ca\/earthhistorylab\/wp-json\/pressbooks\/v2\/chapters\/314\/revisions"}],"predecessor-version":[{"id":492,"href":"https:\/\/pressbooks.bccampus.ca\/earthhistorylab\/wp-json\/pressbooks\/v2\/chapters\/314\/revisions\/492"}],"part":[{"href":"https:\/\/pressbooks.bccampus.ca\/earthhistorylab\/wp-json\/pressbooks\/v2\/parts\/161"}],"metadata":[{"href":"https:\/\/pressbooks.bccampus.ca\/earthhistorylab\/wp-json\/pressbooks\/v2\/chapters\/314\/metadata\/"}],"wp:attachment":[{"href":"https:\/\/pressbooks.bccampus.ca\/earthhistorylab\/wp-json\/wp\/v2\/media?parent=314"}],"wp:term":[{"taxonomy":"chapter-type","embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/earthhistorylab\/wp-json\/pressbooks\/v2\/chapter-type?post=314"},{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/earthhistorylab\/wp-json\/wp\/v2\/contributor?post=314"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/earthhistorylab\/wp-json\/wp\/v2\/license?post=314"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}