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Red beds

Palo Duro Canyon. The red, lower slopes of the Canyon are Permian in age. These layers were deposited in a shallow marine environment which alternated with dry tidal flats.
Siccar Point, eroded gently sloping Devonian Old Red Sandstone layers forming capping over conglomerate layer and older vertically bedded Silurian greywacke rocks.
Vivid New Red Sandstone, Triassic period. It shows cross-bedded dune sandstone formed in a desert. Devon, near mouth of the River Exe
Permian redbeds

The term red beds usually refers to strata of reddish-colored sedimentary rocks such as sandstone, siltstone or shale that were deposited in hot climates under oxidizing conditions.[1] They are usually formed in terrestrial situations: on land, and in rivers and lakes.

The red color comes from iron oxide in their mineral structure. Although they have been deposited throughout the Phanerozoic, they are most commonly associated with rocks deposited during the Devonian, Permian and Triassic periods. The Old Red Sandstone is one of the most famous rock formations.

Red beds have economic significance since many of them contain reservoirs of petroleum and natural gas.

Secondary red beds are linked to the uplift, erosion and surface weathering of previously deposited sediments and require conditions similar to primary red beds for their formation.

  1. ↑ "Ventura Red Beds". Archived from the original on 2007-02-25. Retrieved 2011-01-25.
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