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Assise
Stratigraphic unit From Wikipedia, the free encyclopedia
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In geology, an assise (from the French, derived from Latin assidere, "to sit beside") is two or more beds or strata of rock united by the occurrence of the same characteristic species or genera.[1] In the hierarchy of stratigraphic units, an assise lies between a stage (or sub-stage) and a stratum.[2]
Look up assise in Wiktionary, the free dictionary.
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