page_title: Red beds
hierarchical_section_title: Red beds
caption_attribution_description: English: Cross bedded Red Triassic Sandstone Cliffs
context_page_description: 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. 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.
context_section_description: 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. 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.
caption: Vivid New Red Sandstone, Triassic period. It shows cross-bedded dune sandstone formed in a desert. Devon, near mouth of the River Exe
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