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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Rancholabrean ： ウィキペディア英語版 Rancholabrean The Rancholabrean North American Land Mammal Age on the geologic timescale is the North American faunal stage according to the North American Land Mammal Ages chronology (NALMA), typically set from less than 240,000 years to 11,000 years BP, a period of .〔Sanders, A.E., R.E. Weems, and L.B. Albright III (2009) Formalization of the mid-Pleistocene "Ten Mile Hill beds" in South Carolina with evidence for placement of the Irvingtonian–Rancholabrean boundary, ''Museum of Northern Arizona Bulletin'' 64:369-375〕 Named after the famed Rancho La Brea fossil site (more commonly known as the La Brea tar pits) in Los Angeles, California,〔Savage, D.E. (1951) Late Cenozoic vertebrates of the San Francisco Bay region, ''University of California Publications, Bulletin of the Department of Geological Sciences'' 28:215-314〕 the Rancholabrean is characterized by the presence of the genus ''Bison'' in a Pleistocene context, often in association with other extinct Pleistocene forms such as ''Mammuthus''.〔 The age is usually considered to overlap the Middle Pleistocene and Late Pleistocene epochs. The Rancholabrean is preceded by the Irvingtonian NALMA stage. The Rancholabrean can be further divided into the substages of: *Sheridanian: Upper boundary source of the base of the Holocene (approximate)〔(Paleobiology Database, Sheridanian substage )〕 The Rancholabrean shares this time period with the Oldenburgian of European Land Mammal Ages. ==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「Rancholabrean」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.