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Fundamentals of Physical Geography

2nd Edition
James Petersen
ISBN: 9781133606536

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BuyFindarrow_forward

Fundamentals of Physical Geography

2nd Edition
James Petersen
ISBN: 9781133606536
Textbook Problem

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FIGURE 16.20 Glacial till, here deposited by an alpine glacier in the Sierra Nevada, consists of an unsorted, unstratified, rather jumbled mass of gravel, sand, silt, and clay.

Why does till have these disorganized characteristics?

To determine

The reason why does till have these disorganized characteristics.

Explanation

Glacial till is unsorted, unstratified sediments carried by glaciers as it moves and is left beneath, at the sides and at the glacier’s toe in moraines. It is a chaotic mass of clay, sand, silt, and gravel.

The bedrock load carried on the base and sides of the glacier obtained by glacial plucking and abrasion occur in all sizes, ranging from rock flour (collective term for clay sized particles and crushed rock) to giant boulders. In addition, mass wasting along steep mountain slopes contributes sediments of various sizes to the surface of the ice and sides...

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