{"id":227302,"date":"2025-06-06T04:39:00","date_gmt":"2025-06-06T04:39:00","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=227302"},"modified":"2025-06-06T04:39:03","modified_gmt":"2025-06-06T04:39:03","slug":"arrange-the-layers-of-rock-from-oldest-to-youngest-using-the-laws-of-stratigraphy","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/06\/06\/arrange-the-layers-of-rock-from-oldest-to-youngest-using-the-laws-of-stratigraphy\/","title":{"rendered":"‘Arrange the layers of rock from oldest to youngest using the laws of stratigraphy"},"content":{"rendered":"\n

‘Arrange the layers of rock from oldest to youngest using the laws of stratigraphy . Write below each picture the sequence of letter that corresponds to each layer.’<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n

Here are the correct sequences from oldest to youngest<\/strong> for each image, based on the laws of stratigraphy<\/strong> (superposition, original horizontality, cross-cutting relationships, and inclusions):<\/p>\n\n\n\n

\n\n\n\n

Image 1:<\/strong>
F \u2013 E \u2013 D \u2013 C \u2013 B \u2013 A<\/strong><\/p>\n\n\n\n

Image 2:<\/strong>
C \u2013 A \u2013 E \u2013 H \u2013 D \u2013 B \u2013 G \u2013 F<\/strong><\/p>\n\n\n\n

Image 3:<\/strong>
B \u2013 C \u2013 A \u2013 D<\/strong><\/p>\n\n\n\n

Image 4:<\/strong>
E \u2013 D \u2013 B \u2013 C \u2013 A<\/strong><\/p>\n\n\n\n

\n\n\n\n

Explanation<\/h3>\n\n\n\n

The laws of stratigraphy help geologists determine the relative ages of rock layers and understand Earth\u2019s geologic history.<\/p>\n\n\n\n

1. Law of Superposition:<\/strong> In undisturbed horizontal rock layers, the oldest layer is at the bottom and the youngest is at the top. This principle applies clearly in Image 1<\/strong>, where the sequence F through A follows simple superposition, as the layers are horizontal and undisturbed.<\/p>\n\n\n\n

2. Law of Original Horizontality:<\/strong> Sedimentary rocks are originally deposited in horizontal layers. If layers are tilted or folded, that happened after their formation. Image 4<\/strong> shows folded strata, indicating post-depositional events. The intrusion (labeled A) cuts through all layers, making it the youngest.<\/p>\n\n\n\n

3. Law of Cross-Cutting Relationships:<\/strong> Features such as faults or igneous intrusions that cut across rocks are younger than the rocks they cut through. Image 2<\/strong> demonstrates this with intrusion H and fault G, both of which cut through other layers, placing them later in the sequence.<\/p>\n\n\n\n

4. Law of Inclusions:<\/strong> Rock fragments included in another rock must be older than the host rock. While not directly visible here, this principle supports relative dating when inclusions are present.<\/p>\n\n\n\n

Image 3<\/strong> includes a dome-like intrusion (B), which is younger than the overlying layers (C and D) because it cuts through them.<\/p>\n\n\n\n

By analyzing the visual clues and applying these stratigraphic laws, the relative ages of rock layers can be accurately interpreted even without absolute dating methods. Understanding these sequences helps geologists reconstruct past environments and geologic events like earthquakes, magma intrusions, and erosion.<\/p>\n\n\n\n

\"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"

‘Arrange the layers of rock from oldest to youngest using the laws of stratigraphy . Write below each picture the sequence of letter that corresponds to each layer.’ The Correct Answer and Explanation is: Here are the correct sequences from oldest to youngest for each image, based on the laws of stratigraphy (superposition, original horizontality, […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-227302","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/227302","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=227302"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/227302\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=227302"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=227302"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=227302"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}