Earth: An Introduction to Physical Geology (12th Edition)

Published by Pearson
ISBN 10: 0134074254
ISBN 13: 978-0-13407-425-2

Chapter 18 - Section 18.4 - Glacial Deposits - Concept Checks - Page 556: 5

Answer

Outwash deposits and ice-contact deposits are distinct types of glacial deposits. Outwash deposits are formed by meltwater streams that carry and deposit sediments away from a glacier. These deposits are typically well-sorted and stratified, consisting of sand, gravel, and finer particles. They form in areas beyond the glacier's terminus, often creating outwash plains or deltas. On the other hand, ice-contact deposits are formed in direct contact with the ice of a glacier. They result from sediment deposition as the glacier melts or from debris that falls onto the glacier's surface. Ice-contact deposits include materials such as till, which is unsorted and unstratified and may contain a mix of particle sizes. These deposits are commonly found along the sides and front of glaciers, and they can form moraines, kames, eskers, or other landforms associated with glacial activity.

Work Step by Step

From the text in section 18.4.
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