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
..... Click the link for more information. ). 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.
New Red Sandstone[′nü ′red ′san‚stōn]
The red sandstone facies of the Permian and Triassic systems exposed in the British Isles.