Refer to diagram 1 above. All of the lower case letters refer to sedimentary uni

Question

Refer to diagram 1 above. All of the lower case letters refer to sedimentary units. They are right-side up and there are no faults along the contacts between these layers other than the one that is labeled. There is a sequence of 10 events here, including the deposition of units a-f and y, folding of units a through f, fault movement along the fault, and intrusion of a granitic pluton. Ignore the stratigraphic horizon that lies beneath "a" and note that "pluton" refers to a body of granite in this example. Put a number from 1 (oldest) lo 10 (youngest) for each of the following: intrusion of pluton folding of layers a through f deposition of y deposition of a deposition of b deposition of c deposition of d deposition of c deposition of f movement along fault

Explanation / Answer

There is intrusion of pluton. Then deposition of bed a take place. After this deposition of bed a, deposition of beds from b to f takes place. Then folding of these units take place. Then faulting of these bed units take place from bed a to f. Eventually deposition of unit y takes place.

16. Intrusion of pluton

17. deposition of a

18. deposition of b

19. deposition of c

20. deposition of d

21. deposition of e

22. deposition of f

23. folding of layers a through f

24. movement along fault

25. deposition of y

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