Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
16 Cards in this Set
- Front
- Back
|
continental glacier
|
A glacier that flows outward from a zone of accumulation to cover a large part of a continent
may cover several million kilometers ice sheets |
|
|
drumlins
|
Streamlined HILLS of glacial origin aligned north-to-south that have steep sides, a blunt north slope, and a gentle slope to the south; made of till
point in the direction that glacier was moving |
|
|
erratics
|
Large boulders transported from one area to another by glaciers
often different in mineral composition than bedrock of area thats how we know they were transported there |
|
|
grooves
|
Furrows of glacial origin in bedrock that are deeper and wider than striations
|
|
|
kettle
|
A small closed basin( lake) formed in a moraine
|
|
|
moraine
|
A mass of till ( unsorted sediment) deposited by a glacier
|
|
|
outwash
|
SORTED sediments deposited by water from MELTWATER
|
|
|
striations
|
Parallel scratches in bedrock that were made by rocks transported by glaciers
direction of gouges shows path of movement of glacier |
|
|
terminal moraine
|
Irregular, hilly deposits of till formed where a glacier stopped advancing and began to melt back
forms at the END of the glacier |
|
|
till
|
UNSORTED sediments deposited by a GLACIER
|
|
|
valley glaciers
|
Glaciers that begin in high mountain areas and flow through valleys to lower elevations
|
|
|
glacier
|
mass of snow covered ice that moves due to the force of gravity
|
|
|
2 types of glaciers
|
valley glacier ( alpine)
continental ( ice sheet/ ice cap) |
|
|
snow line
|
lowest elevation that PERMANENT snows reach in the summer
highest near equator lowest near the poles |
|
|
fastest part of glacier's movement
|
in center of the flow
|
|
|
Glaciers carve out
|
U-Shaped Valleys
|
