Concept explainers
A student examining a roadcut excavated through a mountain ridge recorded the following observations:
Event in Sequence |
Description |
A |
Normal fault that cuts across D and E |
B |
Basalt dike that cuts across A |
C |
Erosion that cuts across B. A. D. and E |
D |
Reverse fault that cuts across E |
E |
Sequence of sandstone, shale, and limestone folded in a syncline |
By applying the principles of reading history from rocks, arrange the events, including the folding, in the correct order from oldest to youngest.

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Chapter 21 Solutions
Physical Science (12th Edition), Standalone Book
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