DOI: 10.1016/j.quascirev.2014.02.003
Scopus记录号: 2-s2.0-84903608250
论文题名: Tocuila Mammoths, Basin of Mexico: Late Pleistocene-Early Holocene stratigraphy and the geological context of the bone accumulation
作者: Gonzalez S. ; Huddart D. ; Israde-Alcántara I. ; Dominguez-Vazquez G. ; Bischoff J.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2014
卷: 96 起始页码: 222
结束页码: 239
语种: 英语
英文关键词: Lake Texcoco
; Mammoths
; Meteorite airburst
; Tephra
; Younger Dryas
Scopus关键词: Lakes
; Meteorites
; Stratigraphy
; Volcanoes
; Lakes
; Meteorites
; Stratigraphy
; Volcanoes
; Catastrophic event
; Environmental disruption
; Mammoths
; Nevado de Toluca Volcano
; Plinian eruption
; Tephra
; Tephrochronology
; Younger Dryas
; Late Pleistocene
; Bone
; Bone
; biostratigraphy
; bone
; dating method
; environmental effect
; Holocene
; mammoth
; shoreline
; volcanic eruption
; accumulation
; lacustrine deposit
; mass extinction
; meteorite
; Pleistocene-Holocene boundary
; tephra
; tephrochronology
; Younger Dryas
; Mexico [North America]
; Valley of Mexico
; Bison
; Camelidae
; Plinia
; Toluca
英文摘要: We report new stratigraphic, tephrochronology and dating results from the Tocuila Mammoth site in the Basin of Mexico. At the site there is evidence for a thin meteorite airburst layer dated between 10,878 and 10,707calBC at the onset of the Younger Dryas (YD) cool period. The Upper Toluca Pumice (UTP) tephra marker, caused by a Plinian eruption of the Nevado de Toluca volcano, dated from 10,666 to 10,612calBC, is above that layer. The eruption must have caused widespread environmental disruption in the region with evidence of extensive reworking and channelling by the Lake Texcoco shoreline and contributed to the widespread death and/or extinction of megafaunal populations, as suggested by earlier authors, but the new work reinforces the view that both catastrophic events must have caused large environmental disruption in a short time period of around two hundred years. There is no evidence for megafauna (mammoths, sabre toothed cats, camels, bison, glyptodonts) after the UTP volcanic event and subsequent lahars in the Basin of Mexico. At Tocuila, although there are some in situ tephra markers in nearshore lake sediments, such as the Great Basaltic Ash (GBA) and the UTP Ash, there is evidence of much reworking of several tephra populations in various combinations. The mammoth bone accumulation is reworked in a lahar sequence (volcanic mudflow) derived from several source sediments but associated with the major UTP Plinian eruption. Paleoindian populations were also present in the Basin of Mexico during the YD period, where several Paleoindian skeletons were found associated with the UTP ash deposits, e.g. Metro Man, Chimalhuacan Man and Tlapacoya Man. © 2014 The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60233
Appears in Collections: 过去全球变化的重建
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作者单位: School of Natural Sciences and Psychology, Liverpool John Moores University, Liverpool L3 3AF, United Kingdom; Geology and Mineralogy Department, IIM, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán, Mexico; Faculty of Biology, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán, Mexico; United States Geological Survey, Menlo Park, CA, United States
Recommended Citation:
Gonzalez S.,Huddart D.,Israde-Alcántara I.,et al. Tocuila Mammoths, Basin of Mexico: Late Pleistocene-Early Holocene stratigraphy and the geological context of the bone accumulation[J]. Quaternary Science Reviews,2014-01-01,96