Figure G-7 consists of three geologic maps, each of which has two topographic profiles below it. For each map there are at least two possible interpret- ations for the contact. Sketch two geologically plaus- ible structure sections for each map, as was done in Fig. 3.12. In the space provided below each set of diagrams, indicate which of your two structure sec- tions you consider most likely to be correct, and briefly give your reasons.
These structure sections should be quick sketches that show relationships between adjacent rock units. You do not need to be concerned with each apparent dip; merely approximate the dips freehand.
Formation A 1-20 20 Formation R 15y 454 +11 57* 50 + 20 1-38 X . X X- -X' X 19, 38 b -23 X' consider most likely, and why. For use in Problem 3.4. granodiorite 18 y Formation Y Formation Z Formation Q Fig. G-7 Three geologic maps, each with two topographic profiles and space to explain which interpretation yo X _ X' X X' X 1 1 X' Name .X' X .X' -X' a
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