Page 124 - DK Children's Encyclopedia

Glaciers SEE ALSO

▸ ▸ Antarctica p.24
▸ ▸ Arctic p.25
Glaciers are slow-moving rivers of ice. They form high up ▸ ▸ Changing world
in mountains or regions near Earth’s poles and flow pp.50–51
downhill. The front of a glacier may melt to make a river or ▸ ▸ Climate change

lake. If a glacier reaches the coast, huge blocks of it break p.60
off and float away into the ocean as icebergs. ▸ ▸ Erosion p.93
▸ ▸ Mountains p.172

How are glaciers made? The dark streaks A lake of melted ice Glaciers can wear
Glaciers are made from snow that builds on the surface are often forms at the down the sides of
mountains, making
front of a glacier.
rocks carried along
up and turns into ice. Eventually, there is by the glacier. them pyramid-shaped.
so much ice that it starts to flow downhill.

Signs of
glaciers
Some parts of the world
were once colder and
covered in glaciers.
As the climate warmed,
the glaciers melted away. U-shaped valley Sharp ridge Giant rocks
However, they left signs Glaciers carve steep-sided valleys An arête is a sharp ridge of rock Glaciers can pick up giant rocks and
in the landscape that they into flatter U-shaped ones as ice that separates two valleys that dump them far from where they
were once there.
and rock grind the hillside away. once had glaciers in them. came. They are called erratics.

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