Red beds

Red beds (or redbeds) are sedimentary rocks, typically consisting of sandstone, siltstone, and shale, that are predominantly red in color due to the presence of ferric oxides. Frequently, these red-colored sedimentary strata locally contain thin beds of conglomerate, marl, limestone, or some combination of these sedimentary rocks. The ferric oxides, which are responsible for the red color of red beds, typically occur as a coating on the grains of sediments comprising red beds. Classic examples of red beds are the Permian and Triassic strata of the western United States and the Devonian Old Red Sandstone facies of Europe.^[1]^[2]

^ Dictionary of mining, mineral, and related terms (2nd ed.). Alexandria, Va.: American Geological Institute in cooperation with the Society for Mining, Metallurgy, and Exploration, Inc. 1997. ISBN 0-922152-36-5. Retrieved 8 November 2020.
^ Neuendorf, K. K. E.; Mehl, J. P. Jr.; Jackson, J. A., eds. (2005). Glossary of Geology (5th ed.). Alexandria, Virginia: American Geological Institute. ISBN 0-922152-76-4.

[1] Dictionary of mining, mineral, and related terms (2nd ed.). Alexandria, Va.: American Geological Institute in cooperation with the Society for Mining, Metallurgy, and Exploration, Inc. 1997. ISBN 0-922152-36-5. Retrieved 8 November 2020.

[NeuendorfOthers2005a-2] Neuendorf, K. K. E.; Mehl, J. P. Jr.; Jackson, J. A., eds. (2005). Glossary of Geology (5th ed.). Alexandria, Virginia: American Geological Institute. ISBN 0-922152-76-4.

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