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Typically red, or occasionally green or grey, these strata are generally featureless and contain few fossils. In basin formations, thick
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78:-bearing layers, or rock salt deposits, are sometimes present at the base of the marl.
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British
Geological Survey: Lexicon of Named Rock Units: Mercia Mudstone Group
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Permian and
Triassic Red Beds and the Penarth Group of Great Britain
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In modern nomenclature, Keuper marl is included within the
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is a former and now deprecated term for multiple layers of
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127:, No. 24 (Joint Nature Conservation Committee; 2002)
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239:United Kingdom geologic formation stubs
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125:Geological Conservation Review Series
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47:age which occur beneath parts of the
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166:This article about a specific
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119:Benton M, Cook E, Turner P.
51:and neighbouring areas e.g.
173:in the United Kingdom is a
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234:Triassic System of Europe
109:(accessed 10 April 2010)
83:Mercia Mudstone Group
224:Siltstone formations
229:Mudstone formations
132:2011-02-04 at the
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18:Keuper Marl
218:Categories
89:References
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45:Triassic
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76:halite
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