For questions 33 through 40 please refer to the NW – SE cross section A – A’ acr

Question

For questions 33 through 40 please refer to the NW – SE cross section A – A’ across Essos (Figure 5):

https://drive.google.com/file/d/17IBP9PEFoF4gdXbF_imvwwf7H194VAEG/view?usp=drivesdk

Questions 33through 40: Multiple Choice: Mark the best answer for each question.
33. The contact at the base of the lower breccia unit is a(n):
a. nonconformity.
b. angular unconformity.
c. disconformity.
d. intrusive contact.
e. fault (tectonic) contact.
34. The contact between the dolomite and the underlying tilted sequence is an example
of a(n):
a. nonconformity.
b. angular unconformity.
c. disconformity.
d. intrusive contact.
e. fault (tectonic) contact.
35. The contact between the dolomite and the underlying granite is an example of a(n):
a. nonconformity.
b. angular unconformity.
c. disconformity.
d. intrusive contact.
e. fault (tectonic) contact.
36. The tilted sequence generally dips in which direction?
a. Northwest
b. Southwest
c. Northeast
d. Southeast
37. The fault depicted in this cross-section is the product of what kind of stress on the
crust?
a. compression
b. tension
c. latteral shearing stress
d. impossible to know from the information given
38. Which statement best descibes the activity of the fault?
a. The fault depicted in this cross-section is inactive.
b. The fault depicted in this cross-section could be active.
c. It is imposible to tell if the fault is likely active or not.
39. How many periods of mountain building are depicted in this cross-section?
a. 1 b. 2 c. 3 d. 4 e. there are no mountain building events depicted
40. Could the faulting and volcanism depicted in this cross-section have occurred in the
same plate-tectonic setting?
d. Yes they more than likely formed in the same tectonic setting.
e. No the faulting and the two volcanic events depicted happen in dfferent
tecontic settings.

Explanation / Answer

33. Option e is correct, as the lower breccia unit is placed just adjacent to the fault plain resulting in the formation of fault tectonic contact.
34. option b is correct, as the contact between the dolomite and underlying tilted sequences are developed in the angular unconformity.
35. Option a is correct, granite is an igneous origin whereas the dolomite is of sedimentary origin and this sharp contrast in the contact gives rise to the formation of the nonconformity.
36. The tilt is in the Southeast direction.
37. the cross section is the thrust faults sequence so hence the sedimentary sequence could have undergone the compression stress so the option a is correct.
38. As this section is of Thrust region so the fault could be active so the option b is the best suitable option for all the options.
39. It's not clear how many mountain building events have undergone this area so the last option is the best option i.e., option e.
40. No volcanic and faulting is not associated with the same geological plate setting they have occurred in two different time interval so the option e is correct for this.

Related Questions

Navigate

• Browse (All)
• Browse F
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.