15 Questions
What is another name for the Pleistocene Epoch?
Ice Age
What are erratics?
Large boulders, transported a long distance from their source
What are the engraved marks left by moving glaciers called?
Striations
Where do end moraines form?
Along the outer edge of an ice sheet
What does meltwater transport?
Sand and gravel
What lobe moved over Delano?
Des Moines lobe
What could be another name for any lobe?
Finger
What color deposits did the Wadena lobe leave and where did they come from?
Gray - Deposits from Winnipeg lowland in Southern Manitoba
What is a 'driftless' area?
Lack of or unknown exposure to till – ice free
During what time period did Minnesota's sediment come?
Pleistocene Epoch/Wisconsin Age
How big was Lake Agassiz compared to the current Great Lakes?
Greater than Great Lakes combined
What did the draining water from Lake Agassiz form?
The valley for the MN river
What are three beautiful features of Minnesota that can be attributed to glaciers?
Rolling hills of ground moraine, deep river valleys, 10,000 lakes
What lobe is considered the most recent?
Des Moines lobe
What types of weather help glaciers move?
Climate changes & precipitation
Study Notes
Glacial Features and Movement
- The Pleistocene Epoch is also known as the Ice Age.
- Erratics are rocks carried by glaciers from one location and deposited in another.
Glacial Marks and Moraines
- Engraved marks left by moving glaciers are called striations.
- End moraines form at the point where the glacier stops moving.
Glacial Lobes and Deposits
- The Wadena lobe moved over Delano.
- Any lobe can be referred to as a glacier tongue.
- The Wadena lobe left red deposits, which originated from the Red River Valley.
Glacial History in Minnesota
- Minnesota's sediment came from the Pleistocene Epoch, also known as the Ice Age.
- Lake Agassiz was larger than the current Great Lakes combined.
- The draining water from Lake Agassiz formed the Mississippi River and the Gulf of Mexico.
Glacial Features in Minnesota
- Three beautiful features of Minnesota attributed to glaciers are the state's many lakes, rolling hills, and fertile soil.
- The Des Moines lobe is considered the most recent glacial lobe.
Glacial Movement
- Glaciers move with the help of warm and wet weather.
Test your knowledge of the Pleistocene and Holocene epochs with this quiz. Explore the time periods, ice ages, glaciation, and glacial movements that shaped the Earth's landscape.
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