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Slide Notes

Glaciers are just a lot of ice.

You can find them in the alpine or they can cover an entire continent.

Large ones actually alter the global climate.
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Glaciers

Published on Nov 25, 2015

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PRESENTATION OUTLINE

BIG ICE CUBES

Glaciers are just a lot of ice.

You can find them in the alpine or they can cover an entire continent.

Large ones actually alter the global climate.
Photo by laffy4k

BUT DIRTY

They're pretty dirty.

Like Danny is ....

This dirt, often massive rocks, scrape the land into many of the features we enjoy today.

GLACIERS

EXPAND SHRINK
Not like a sponge ...

They collect more ice and grow or loose mass and shrink.

CHUNKS OF DIRTY ICE

Photo by Nathan Wong.

continental

EFFECT GLOBAL CLIMATE
Photo by VinothChandar

ages

2 MILLION TO PRESENT (QUATERNARY)
We've discussed that the earth was once a massive snowball.

More recently, there have been a number of times when much of North America was covered in kilometres of ice.

There was so much ice in the most recent one that our continent is still rebounding from all that mass.

Karoo

350 TO 250 MILLION YEARS AGO
Photo by subarcticmike

ALPINE

Photo by DCSL

LAND CARVERS

ESKER

An esker is when an under glacier river gets packed full of gravel.

When the glacier recedes, you're left with a river fossil that eventually is covered with soil and trees.

MORRAINE

Moraines (it should have only one "r") are piles of debris left by the glacier.

It pushes it to the side or the front as it grows.
Photo by benoit_d

KETTLE LAKES

Kettle lakes are created when a massive block of ice calves off of a glacier. It sits there as debris piles around it and then melts.

This leaves a roundish lake.
Photo by WordRidden

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Before

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After.

Pick a couple of the features and research them.

Drumlin
Till
Erratic
Arete
Cirque
Fjord
Kame
Tarn