222 Historical Geology Exercise 5-6 HURON QUADRANGLE, SOUTH DAKOTA Answer the fo

Question

222 Historical Geology Exercise 5-6 HURON QUADRANGLE, SOUTH DAKOTA Answer the following qustions using Figure 5.9 a. Which deposits are younger, the stream deposits or the glacial deposits? How did you determine this relationship? b. Are these glacial deposits from alpine or continental glaciation? c. What kind of moraine is the Antelope Moraine? d. What kind of stream pattern is exhibited by the James River? e. The floodplain alluvium (Qal) is more recent than the older stream deposits (Ood).The Ood forms flat, raised areas above the Bloodplain. What kind of stream features are these? f. What do you think was the source of sediment for the Oal and Qod stream deposits before the river eroded, transported, and deposited them?

Explanation / Answer

A. Glacier deposits are younger.

Generally fluvial deposits deposited the eroded particles of older rocks or may be younger. But glacier not.

B. Those deposits are alpine glacier deposits.

C. Antelope moraine is lateral moraine.

D. Channel type or Antecedent type of stream patterns exhibit by james river.

E. Braided. Meandering. Straight type stream feature

F. Mainly sedimentary rocks are the source of sediments.

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