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Document Type

Research

Abstract

Mud and clay pebbles and cobbles have been observed at many places by different people. They seem to be most common in recent stream deposits and are sometimes seen in eroded alluvial plain sediments. A few geologists have contended that the presence of these mud or clay pebbles in deposits indicates that the deposit as a whole was formed in connection with glaciation and at temperatures near or below freezing. The reason for this conclusion is the belief that balls of mud could not withstand the abrasive and disruptive action of stream transportation unless they were frozen and hard, simulating in that condition a fragment of indurated rock. This may be the history of some mud pebbles in some deposits but it is not a safe criterion on which to date a deposit of sediment.

Publication Date

1927

Journal Title

Proceedings of the Iowa Academy of Science

Volume

34

Issue

1

First Page

249

Last Page

251

Copyright

© Copyright 1927 by the Iowa Academy of Science, Inc.

Language

en

File Format

application/pdf

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