GEOLOGY
PHYSICAL GEOLOGY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Mountain
|
|
|
Glacier
|
|
|
Hill
|
|
|
River
|
Detailed explanation-1: -Moraine-dammed lakes form when meltwater is trapped behind the moraine left behind at the end of a retreating glacier. The Great Lakes actually began as moraine-dammed lakes.
Detailed explanation-2: -About 20, 000 years ago, the climate warmed and the ice sheet retreated. Water from the melting glacier filled the basins, forming the Great Lakes.
Detailed explanation-3: -A drumlin is a long, low hill of sediments deposited by a glacier. Drumlins often occur in groups. These groups are called drumlin fields.
Detailed explanation-4: -Thousands of years ago, the melting mile-thick glaciers of the Wisconsin Ice Age left the North American continent a magnificent gift: five fantastic freshwater seas collectively known today as the Great Lakes-Lake Superior, Lake Huron, Lake Michigan, Lake Erie and Lake Ontario.
Detailed explanation-5: -The lakes formed by glacial erosion, but geological features that formed 300 million to 1.2 billion years ago predetermined the shapes of America’s huge inland seas.