New Red Sandstone


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New Red Sandstone,

name for the thick red layer of the Triassic formation in Great Britain (see Triassic periodTriassic period
, first period of the Mesozoic era of geologic time (see Geologic Timescale, table) from 205 to 250 million years ago.

Throughout the Triassic, E North America, as a result of the mountain-building episode that formed the Appalachians in the late Paleozoic
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). It is many thousands of feet thick and is composed chiefly of red sandstones, clays, and conglomerate; the red color and the occurrence of workable quantities of salt and gypsum suggest markedly arid conditions at the time of deposition.
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New Red Sandstone

[′nü ′red ′san‚stōn]
(geology)
The red sandstone facies of the Permian and Triassic systems exposed in the British Isles.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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