red beds

British  

plural noun

1. sequences of red sedimentary rocks, usually sandstones or shales, coloured by the oxidization of the iron in them

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Example Sentences

Hotton spent several field seasons excavating fossils from rock outcrops in north central Texas known as the Red Beds.

From Science Daily

Two red beds illustrated in her essay, made in New England around 1800, are now for sale through the dealer Austin T. Miller in Columbus, Ohio, and priced between $7,500 and $8,500 each.

From New York Times

Great aridity now prevails north of the Himalayas and related ranges, and red beds are accumulating in the centers of the great deserts, such as those of the Tarim Basin and the Transcaspian.

From Project Gutenberg

Such conditions may have given rise to the high degree of oxidation in the famous Permian red beds.

From Project Gutenberg

If the air of the early Permian contained an unusual percentage of oxygen because of the release of that gas by the great plant beds which formed coal in the preceding era, as Chamberlin has thought probable, the tendency to produce red beds would be still further increased.

From Project Gutenberg