Name ___________________________KEY______________________________________________________________________________ Period __________
Erosion by Glaciers: How do glaciers cause erosion and deposition?
Guided Notes
Any large mass of ice that moves slowly over land.
Slide 2: Glaciers are:
Slide 3: Glaciers form:
In areas where more snow falls than melts.
Slides 4 – 9: What are the types of glaciers?
Complete the following Venn diagram comparing and contrasting
continental and valley glaciers. Hints: 1. Use information from slide 5 go in the middle of the Venn diagram. 2. Use the
information in slides 6 and 7 for the Continental Glaciers. 3. Use the information in slides 8 and 9 for the Valley Glaciers.
Continental Glaciers
Valley Glaciers
Description: a long narrow
glacier that forms when snow
and ice builds up in a mountain
valley.
Description: a glacier that covers
much of a continent
Feature: Continental glaciers can
spread out over millions of
square kilometers.
Location Today: Cover
approximately 10% of Earth’s
surface mainly in Greenland and
Antarctica.
Feature: Although much smaller
Large masses of ice
Move slowly on land
Shape the land
Past: Ice Ages – when large
parts of Earth were covered with
Continental glaciers
.
Can flow in all directions. They
spread out much as pancake
batter spreads out in a frying
pan
than continental glaciers, valley
glaciers can be tens of kilometers
long.
Location Today: High up in
many mountain ranges
worldwide.
Past: U-shape valleys show
where Valley glaciers once
slid down from a mountain.
Move due to the force of
gravity
Slides 10-12: How do Glaciers Cause Erosion?
The two processes
by which glaciers
Plucking
The process by which a glacier picks up
rocks as it flows across the land.
Abrasion
Occurs as a glacier drags the plucked rock over the
ground and the land is gouged & scratched.
erode the land are
Slide 14: What Landforms are created by Glacial Erosion?
Horn
When
glaciers carve
away the
sides of a
mountain,
the result is a
sharpened
peak.
Cirque
Complete the following table
Fiord
Arête
U-Shaped
Valley
Form when
A bowlA sharp Slowly
the level of
moving
shaped
ridge
the sea rises
valley
hollow
separating
filling a
glaciers
eroded by valley once
two
carve or
cut by a
a glacier.
cirques.
Slide 15: Glacial Till is:
glacier.
scoop out
U-shaped
valleys.
The sediment deposited as a glacier melts and recedes. Glacial till is of
various sizes, and can be in the size of clay, silt, sand, gravel, or boulders.
Slide 16: What Landforms are created by Glacial Deposition?
Complete the following table
Drumlin
A long mound of till that is smoothed in
the direction of the glaciers flow.
Kettle Lake
Forms when a depression left in till
by melting ice fills with water.
Moraine
Forms at the edge of a glacier where the
glacier deposits till and are usually in the form
of a mound or ridge.