Red bed definitions

red bed

(from the article `Earth, geologic history of`) ...all the oxygen that was released? It might be surprising to learn that it took at least 1 billion years before there was sufficient oxygen in the ... [3 related articles]
Found on http://www.britannica.com/eb/a-z/r/21

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red bed

Sedimentary layers composed primarily of sandstone, siltstone, and shale, that are predominantly red in color due to the presence of iron oxides.
Found on http://www.scientificpsychic.com/etc/geology-glossary.html

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red bed

n. Sedimentary layers composed primarily of sandstone, siltstone, and shale, that are predominantly red in color due to the presence of iron oxides; often used in reference to the Permian or Triassic sediments of the western U.S.
Found on http://www.ucmp.berkeley.edu/glossary/gloss2geol.html

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red bed

n. Sedimentary layers composed primarily of sandstone, siltstone, and shale, that are predominantly red in color due to the presence of iron oxides; often used in reference to the Permian or Triassic sediments of the western U.S.
Found on http://www.ucmp.berkeley.edu/glossary/glossary_2.html

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