Which type of fault is the most common in the Glenn Creek area? Are the faults t
ID: 297824 • Letter: W
Question
Which type of fault is the most common in the Glenn Creek area? Are the faults that border Slategoat Mountain the same as or different from the majority of faults on the map? Did the Glenn Fault occur before or after the fault between the Kk and Mm? Look at the Renshaw Thrust. Give the name and geologic period of the formation on the upper block. Do the same for the formation on the lower block. Based on the occurrence of folding and thrust faulting, what major force was acting on this area? After the folding and thrust faulting events, what other type of force acted on this area?Explanation / Answer
Ans to (a): Both the geologic map as well as the cross section show intense shearing. As a result the the most common fault type is understood to be thrust.
Ans to (b): The faults that border Slategaot mountain are different from majority of the faults present in the map. The faults bordering the mountain are normal faults, as such, the mountain can be considered as the horst block uplifted by the bordering normal faults.
Ans to (c): The gleen fault cuts across Mm (Madison Group). Therefore, one can construct the idea that Gleen Fault occured before the fault between Kk and Mm.
Due to poor visibility of the features and text in minute level, ans to (d) is not attempted.
Ans to (e): Based on the occurence of folding and faulting the major force acting on the area was : compressional force.
Ans to (f): After the folding and faulting episodes, the normal faults emerged giving rise to a horst structure. Such an instance is illustrative of extensional force acting over the region.
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