Studying for an exam tomorrow and stumped on this question (parts d and e).
The region show in Map 2 consists of a series of sedimentary strata that have been tilted and then eroded, producing an unconformity. Lava flows covered the unconformity, and the region underwent further tilting and then faulting before erosion transformed the region in to a plain. Using the data provided by Map 2 determine
a. amount of net slip
b. rake of net slip on the fault plan
c. plunge and trend of net slip
d. relative movement along the fault e. type of fault
The original answer for d & e was that the eastern block moved NW relative to the western block, and it was a sinistral reverse fault. Can't remember why I chose reverse and not normal.
Lab TA appears to be saying not sinistral, just 'normal'.
So my questions are, how would you determine that it's a normal fault and not reverse? Why not sinistral?
I can't see an indication of how the foot wall (western block) has moved relative to the hanging wall. I know the TA is the person to ask but it's an online course and answers were slow to come at the best of times.