Red Beds


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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Red Beds

 

a complex of sedimentary rocks consisting primarily of clays, siltstones, and sandstones, with layers of limestones and gypsums, having a red color caused by iron hydroxides and oxides forming a thin film around the sand and clay particles.

The red color, the presence of carbon, and in some cases the presence of gypsum indicate that the red beds were formed under conditions of a dry climate. In places where red beds have been reworked by underground waters, which are contained in sand and gravel horizons, green gleyed horizons may appear in the red beds as a result of the redistribution of iron and other elements. As a result of epigenetic gleying, the red beds sometimes become multicolored. Red beds were deposited primarily on piedmont alluvial plains and in intermontane areas, in the channels, flood-plains, and deltas of rivers and lakes, partially in shallow seas, and at the foot of mountain slopes (proluvium, for example). They have formed over virtually the entire period of geological history, from the Precambrian to the Neocene. (Cambrian, Devonian, Permian, Triassic, Cretaceous, and Paleogene-Neo-cene red beds are most widespread.) Deposits of copper (copper sandstones), uranium, vanadium, fluorite, celestite, gypsum, salts, and oil are associated with red beds.

REFERENCES

Strakhov, N. M. Tipy litogeneza i ikh evoliutsiia v istorii Zemli. Moscow, 1963.
Perel’man, A. I. Geokhimiia epigeneticheskikh protsessov, 3rd ed. Moscow, 1968.
Van Houten, F. B. “Nekotorye nereshennye problemy genezisa krasnotsvetov.” In Problemy paleoklimatologii. Moscow, 1968.

A. I. PEREL’MAN

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Wen, "Red beds distribution and engineering geological problem in China," Chinese Journal of Hydrogeology and Engineering Geology, vol.
At the contact with the basalt, the red beds are mottled; however, it is not considered to be significant as similar variegation was observed in the red beds up-section of the contact.
The brines scavenged metals (principally copper +/- silver and associated lead and zinc) from the deeper Mitu Group red beds and volcaniclastics which were deposited in a failed Traissic rift.
Du, "Model tests for failure mechanism of typical soft rock slopes of red beds under rainfall in South China," Chinese Journal of Rock Mechanics and Engineering, vol.
The source of the salinity of the hot water may be attributed to the subsurface incongruent dissolution of the red beds (containing salts to a larger or lesser degree) [28].
The well was drilled to a vertical depth of 2,499 m below sea-level and was terminated in Red Beds of Late Triassic age.
ABSTRACT: A trackway (Kouphichnium Nopcsa 1923) attributed to a horseshoe crab is described for the first time, from the Bloomsburg Red Beds (Silurian: Ludlow Series), of the Delaware Water Gap National Recreation Area, New Jersey.
Floras from red beds of the Permian Basin of Lodeve (Southern France)
Marine red beds occur in the lower part of the Velise Formation in south Saaremaa and in several cores of mainland southwestern Estonia.
Red beds were in full bloom at this month's Home Textiles Show in everything from deep, jewel tones, spicy hues and washed, antique looks to bright, true-blue reds.