作者
Marcelo F Tejedor, Francisco J Goin, Javier N Gelfo, Guillermo López, Mariano Bond, Alfredo A Carlini, Gustavo J Scillato-Yané, Michael O Woodburne, Laura Chornogubsky, Eugenio Aragón, Marcelo A Reguero, Nicholas J Czaplewski, Sergio Vincon, Gabriel M Martin, Martín R Ciancio
发表日期
2009/3
期刊
American Museum Novitates
卷号
2009
期号
3638
页码范围
1-43
出版商
American Museum of Natural History
简介
Two new fossil mammal localities from the Paleogene of central-western Patagonia are preliminarily described as the basis for a new possible biochronological unit for the early Eocene of Patagonia, correlated as being between two conventional SALMAs, the Riochican (older) and the Vacan subage of the Casamayoran SALMA. The mammal-bearing strata belong to the Middle Chubut River Volcanic-Pyroclastic Complex (northwestern Chubut Province, Argentina), of Paleocene-Eocene age. This complex includes a variety of volcaniclastic, intrusive, pyroclastic, and extrusive rocks deposited after the K-T boundary. Geochronological data taken from nearby volcanic deposits that underlie and overlie the mammal-bearing levels indicate that both faunas are of late early Eocene age (Ypresian-Lutetian boundary). In addition to more than 50 species of mammals, including marsupials, ungulates, and xenarthrans …
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MF Tejedor, FJ Goin, JN Gelfo, G López, M Bond… - American Museum Novitates, 2009