LIS Case Study

Question 1

When was the LIS at maximum extinct - how many degrees North did it reach?

Answer 1

18,000, 37 degrees N

Question 2

How thick was LIS?

Answer 2

2-3km

Question 3

What are the large striations caused by large scale abrasion called?

Answer 3

Mega - scale linations

Question 4

What is an example of an ellipsoidal basin?

Answer 4

Hudson Bay

Question 5

What are the great lakes?

Answer 5

Superior
Michigan
Huron
Erie
Ontario

Question 6

Which great lake is the deepest and longest lake and how deep and long is it?

Answer 6

Superior - 563km long and 400m deep (at its longest and deepest)

Question 7

What do you call a tongue shaped glacier extending from the margins of the main ice sheet?

Answer 7

Ice Lobe

Question 8

Which state was at the fringes of the ice sheet and therefore experienced deposition?

Answer 8

Minnesota

Question 9

What are the 3 moraines found in Minnesota and which ice lobe formed each one?

Answer 9

St Croix Moraine - Superior Ice Lobe
Bemis Moraine - De Moines Ice Lobe
Alexandria Moraine - Rainy and Wadena Lobes

Question 10

What depositional features are found South of the Great Lakes?

Answer 10

Erratic

Drumlins

Question 11

What are the three maidens and where are they found?

Answer 11

They are erratics

SW Minnesota

Question 12

What do you call a body of water impounded in front of a glacier/ice sheet?

Answer 12

Proglacial lake

Question 13

Which of these is an ancient proglacial lake in Montana State which formed times at the end of the ice age?

Answer 13

Lake Missoula

Question 14

What name is given to the landscape created by the meltwater floods from Lake Missoula?

Answer 14

Scablands

Question 15

In which state is the landscape created by the meltwater floods from Lake Missoula located in?

Answer 15

Washington