Essentials of Geology (Fifth Edition)
5th Edition
ISBN: 9780393263398
Author: Stephen Marshak
Publisher: W. W. Norton & Company
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Chapter 10.5, Problem 1QQ
To determine
The appearance of angular unconformity on a geologic map.
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ACTIVITY 10.7 Fossils as Time Indicators Pgs 175-176Use Figure 10.14, page 175, to complete the following.
1. What is the geologic range of plants that belong to the group Ginkgo?From theperiod through theperiod.
2. What is the geologic range of Lepidodendron, an extinct coal-producing plant?From theperiod through theperiod.
3. Imagine that you have discovered an outcrop of sedimentary rock that contains fossil shark teeth and fossils of Archimedes. In which time periods might this rock have formed?From theperiod through theperiod.
ACTIVITY 10.4 Unconformities Pg 1721. Label the angular unconformity and disconformity on Figure 10.10.
2. Identify the types of unconformities in Figure 10.11A and Figure 10.11B
ACTIVITY 10.3 Principles of Cross-Cutting and Inclusions Pg 171Figure 10.8 is a geologic cross-section of a hypothetical area. Use it to answer the following questions.
1. Is the igneous intrusion, dike E, older or younger than rock layers A-D?
2. Is fault H older or younger than rock layers A-D?
3. Is fault H older or younger than sedimentary layers F and G?
4. Did fault H occur before or after dike E? Explain how you arrived at your answer.
5. What evidence supports the conclusion that the igneous intrusion labeled sili B is more recent than the rock layers on either side (A and C)?
ACTIVITY 10.5 Applying Relative Dating Principles Pg 173Use Figure 10.12 to complete the following.
1. Identify and label the unconformities in Figure 10.12.
2. Is rock layer I older or younger than layer H? What relative dating principle did you apply to determine your answer?Rock layer I isthan layer H.Relative dating principle:
3. Is fault L older or younger than rock layer D? What principle did you…
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Essentials of Geology (Fifth Edition)
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