Suggested procedure: First, study the are labeled A through H and the faults PRO

Question

Suggested procedure: First, study the are labeled A through H and the faults PROBLEMS sequence of rocks in the top cross sec 1 and 2 tion and note that the rock sequence F C, I. D, and K underlie the sequence L a. Determine the chronological order (related ages) of the rock E, B, H. J. A, and G. The oldest rock This exercise involves analyzing pho- tographs and block diagrams of areas where crosscutting relations, superposi- would be F. Note that J cuts across L, E Band H bu is younger than A and G. If it is a flow, it b. Examine the bottom cross sec- tion that shows rock bodies, faults, and dikes in a road-cut or canyon- wall. Determine the chronological order of the sequence of events shown in this cross section. . tion, and stages of landscape develop- ment show relative ages of rock bodies that document geologic history. It is an 1. The bottom cross section shows the exercise of observation, thought, and interpretation that should reward you geologic relationship between various rock bodies and faults. The rock bodies with a new awareness of geologic time.

Explanation / Answer

a) (oldest) F-C-I-D-K-L-E-B-H-A-G-J (Youngest)

b) (oldest) C-E-A-F-B-1-H-2-D-G (Youngest)

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