James River Valley Glaciers Questions
1. What story does the surface rocks in the east river area of SD. and James River Valley tell? (glaciations)
2. When did glaciers cover this area? (in the Ice Ages)
3. Was the James River Valley always covered with ice? (No, there was time in between the Ice Ages for vegetation to come back.)
4. What did glaciers do to the rocks? (eroded and deposited)
5. What features of the hill country was caused by glaciers? (irregular features)
6. What is the name of people who study the soil, rocks, etc? (geologist)
7. How many periods was the land covered with glaciers? (4)
8. The east river of SD. has traces of how many glaciers?(4)
9. Was there much time between glaciers? (Yes, enough for life to reestablish)
10. How fast did the last glacier move? (a couple of inches per day)
11. How tall were the glaciers? (1,600ft.)
12. How much pressure did the ice exert? (45tons)
13. When did the last glacier melt? (about 8000 B.C.)
14. How many major aquifers are in the Heartland Area? (3)
15. What directions did the rivers flow before the glaciers? (west to east)
16. What did not exist because of this? (The Missouri River)
17. What did drainage around the western edge of the glacier create? ( The present location of the Missouri River)
18. What hills and peaks appeared after the glaciers? ( Mount Baldy near Orient, Wessington and Wessington Springs Hills, Turtle Peak, Ree (Heights) Hills.
19. What is the difference in the grasses in the east river compared to west river? (East river is tall grass prairie, west short grass)
20. The Heartland region was inhabited by which Indians? (Village Indians, for the most part)