Geology Question For questions 10 through 16 please refer to the cross-section a

Question

Geology Question

For questions 10 through 16 please refer to the cross-section across the Basin and Range
province.

Questions 10 through 13: Multiple Choice: Mark the best answer for each question posed
below.
10. What type of fault exists betwwen B and C?
a. a right-lateral strike-slip fault
b. a left-lateral strike-slip fault
c. a normal fault
d. a reverse (thrust) fault
11. What type of fault exists betwwen D and E?
a. a right-lateral strike-slip fault
b. a left-lateral strike-slip fault
c. a normal fault
d. a reverse (thrust) fault
12. The contact between the shale and the sandstone is an exmaple of a(n)
a. nonconformity.
b. angular unconformity.
c. disconformity.
d. intrusive contact.
e. fault (tectonic) contact.
13. The youngest rock unit in the Basin an Range province is a(n)
a. shale.
b. breccia.
c. sandstone.
d. granite.
e. basalt.
Questions 14 through 16: True/False (Note: True is T(a) and False F(b) on your
scantron).
14. Faulting in this area is inactive.
15. Faulting in this area is the product of tension.
16. The contact along F and D between the granite and the sandstone unit is an intrusive
contact.

Explanation / Answer

10. (c) normal fault
11. (c) normal fault
The rocks in Basin and Range region are subjucted to tensional forces hence giving rise to rifting and normal faulting. In the given image it is clearly evident that the hanging wall has moved down relative to foot wall in both the cases (ie. 10 & 11).

12. (b) angular unconformity.
The shalea touch the sandstone vertically at the contact hence option 'C' is most appropriate.

13. (e) basalt
14. false
15. True
16. false (it is a fault contact)

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