Aim: What are Glaciers?

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Aim What are Glaciers?
I. Glacier found at high altitudes and high
latitudes. These are locations where more snow
falls during the winter than melts in the summer.
The snow accumulates and compaction and
recrystallization changes it to glacial ice.
A. Alpine Glacier glaciers found in high
mountains.
1. Cirques bowl-shaped holes that are gouged
out from alpine glaciers.
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B. Continental Glaciers - large ice sheets like
those found in Antartica and Greenland.

• Glacial till unsorted sediment that glaciers
  carry, push, or drag as they move. These
  sediments may range in size from large boulders
  to the finest clay.
• a. Large fragments in ice form parallel
  striations or grooves in the surface indicating
  the direction the glacier was moving.

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b. Erratics large boulders scattered over a
landscape from melting ice.
2. Glacial valley is in the shape of a U

• Moraine feature that is made of till.
• 4. Terminal Moraine a ridge marking the
  farthest advance of a glacier.

5. Outwash plain a broad area in front of the
terminal moraine deposited by water from the
melting glacier.
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6. Kettle holes depressions resulting from
melting block of ice that were buried in either
the moraine or the outwash.
7. Drumlins hills shaped like the back of the
spoon. Also, can indicate the direction in which
the glacier was moving.
8. Most of the soils found in New York State and
Pennsylvania are thin, rocky, and poorly
developed, made of weathered glacial till.
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Drumlin
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Glacial Till
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Glacier Movement