Problem 9.5 Answer the following questions regarding features on the geologic ma

Question

Problem 9.5 Answer the following questions regarding features on the geologic map shown in Figure G-25 (Appen- dix G). Use the spaces provided on Fig. G-25. This exercise will require you to integrate information from previous chapters as well as this one. I For each fault (A, B, C, D, and E) determine the type of faulting that has occurred and bracket the age of faulting as precisely as possible. 2 Identify the following features indicated by cir- cled, lower-case letters on the map. (a) Type of contacts at localities a, b, c, and d. (b) Specific geologic structure present at local- ities e, f, g, and h. The strike and dip directions that are shown are correct: however, three of the dips are actually overturned. Correct these directly on the map by substituting the correct symbol for overturned 3 beds. 4 Is the unit on the east side of the map labeled Tm" older or younger than the other Miocene rocks on the map? Give a reason for your answer. 5 Determine the minimum amount of displace- ment on fault C

Explanation / Answer

1) Type of A Normal fault

Age between lower miocene to jurassic

Type of B dip slip fault

Age devonian

Type of C strike slip fault

Age devonian

Type of D oblique fault

Age middle miocene

Type of E strike slip fault

Age ordovician

2 a) here every formation is changing with gentle slop indicating unconformity

2b) e: overturned fold

f: basin

g: small fault

h: graben

4) faults occur in the older formation which are found in the west part, the east miocene formation is devoid of such activities hence it is younger

5) it is nearly dippen by amount ~70

6) the given area is tectonically active, because it is showing fold, fault, unconformity, basin, graben etc.

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