. What kind of unconformity exists at letter R above? 2. What kind of unconformity exists at letter H above? Note that P and G are sedimentary rocks parallel to each other. 3. If formation C above has fossils from the early Permian Period and formation I has fossils from the late or upper Jurassic Period, how much time could have elapsed between these two formations? 4. Which letter marks the present day erosional surface? 5. Which letter marks recent deposition of sediment? 6. Which principle of stratigraphy or geologic time helps you understand that B is older than D?

Relative Age Dating

Objective: To learn how to age events and rocks relatively using principles of Earth history
Instructions: Answer the questions below. Submit your answers by uploading a response file (.doc file,
photo or scan) to Blackboard.
Unscramble the sequence of events shown in the figure below by listing the events (e.g., A, B, C, etc) in
chronological order from oldest at bottom to youngest at top.
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1. What kind of unconformity exists at letter R above?
2. What kind of unconformity exists at letter H above? Note that P and G are sedimentary rocks
parallel to each other.
3. If formation C above has fossils from the early Permian Period and formation I has fossils from the
late or upper Jurassic Period, how much time could have elapsed between these two formations?

4. Which letter marks the present day erosional surface?
5. Which letter marks recent deposition of sediment?
6. Which principle of stratigraphy or geologic time helps you understand that B is older than D?

HEW Relative Age Dating SU 20

2 of 2 Grade for this page:
7. Which principle(s) of stratigraphy or geologic time helps you understand that the angled layers (K,
J, etc) are much older than those above them?
Unscramble the sequence of events shown in the figure below by listing the events (e.g., A, B, C, etc) in
chronological order from oldest at bottom to youngest at top. L is an intrusive igneous rock. M are
rocks from layer C.

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8. What kind of unconformity exists at letter K above?
9. Which principle of geologic time tells us that F is younger than H?
10. How is the boundary between L (an igneous intrusion) and C different from a nonconformity?
11. Which event (i.e., letter) above shows the principle of inclusions?

 
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