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Uintan The Uintan North American Stage on the geologic timescale is the North American faunal stage according to the North American Land Mammal Ages chronology (NALMA), typically set from 46,200,000 to 42,000,000 years BP lasting .〔(Paleobiology Database, Uintan )〕 It is usually considered to fall within the Eocene epoch. The Uintan is preceded by the Bridgerian and followed by the Duchesnean NALMA stages. The Uintan is considered to be contained within the Lutetian sharing the upper boundary and contains the following substages: *Late/Upper Uintan. Lower boundary source of the base of the Uintan (approximate). *Early/Lower Uintan. Upper boundary source of the base of the Duchesnean (approximate) ==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Uintan」の詳細全文を読む
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