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Glacial Geology

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Questions and Answers

What is the term for the mix of rock, stones, sand, and clay carried by a glacier?

Lateral moraine (correct)

Ground moraine

Glacial till

Erratic

What is the term for the material deposited by a glacier?

Glacial till

Ground moraine (correct)

Erratic deposit

Lateral moraine

What is characteristic of erratics?

They are only found in glacial till

They are smaller than the surrounding rocks

They are of the same type as the surrounding rocks

They are usually larger than the surrounding rocks (correct)

Which of the following is NOT a characteristic of a lateral moraine?

It is composed of only one type of rock Signup and view all the answers

What is the primary difference between an erratic and a ground moraine?

An erratic is a rock that is out of place, while a ground moraine is a layer of sediment Signup and view all the answers

What is the primary force driving the movement of glaciers?

The force of gravity pulling the ice downhill Signup and view all the answers

What causes the ice in a glacier to deform and move like a slow-moving river?

The weight of the ice and its own pressure Signup and view all the answers

What factor influences the movement of a glacier in addition to gravity?

The temperature of the ice and the presence of meltwater Signup and view all the answers

What is the result of the weight of the ice on a glacier?

The ice slowly deforms and moves like a slow-moving river Signup and view all the answers

What is the role of meltwater at the base of a glacier?

It lubricates the base of the glacier and affects its movement Signup and view all the answers

Study Notes

Glacial Deposition

A lateral moraine refers to the mix of rock, stones, sand, and clay carried by a glacier.

Types of Moraines

Ground moraine: material deposited by a glacier.

Erratics

Erratics are rocks that are different in type from the surrounding rocks and are often larger in size.

Glaciers in Motion

Glaciers flow downhill due to the force of gravity.
The weight of the ice causes it to deform and move slowly, similar to a slow-moving river.
Glacier movement is influenced by the temperature of the ice.
Meltwater at the base of the glacier also affects its movement.