Where: Ethiopia (12.6° N, 37.1° E: paleocoordinates 10.1° N, 34.2° E)
• coordinate based on nearby landmark
• local area-level geographic resolution
When: Chattian (28.1 - 23.0 Ma)
• "Sedimentary rocks total at least 130 m [with vertebrate localities spanning about 55 m in the composite section] and are exposed in a series of stream and gully cuts" that "comformably overlie the uppermost Ethiopian plateau flood basalts. A basalt sample from the base of the section... provides a whole-rock K-Ar date of 32.4 +/- 1.5 Myr... Duplicate 40Ar-39Ar analyses of K-feldspar from a tuff within the fossiliferous portion of the sedimentary section yield ages with a weighted average of 27.36 +/- 0.11 Myr... These data, along with the results from palaeomagnetic studies, support a correlation of the Chilga section with Chron C9n [i.e., Chattian]"
• member-level stratigraphic resolution
Environment/lithology: fluvial; lignite and siltstone
Size class: macrofossils
Primary reference: J. Kappelman, D. T. Rasmussen, W. J. Sanders, M. Feseha, T. Bown, P. Copeland, J. Crabaugh, J. Fleagle, M. Glantz, A. Gordon, B. Jacobs, M. Maga, K. Muldoon, A. Pan, L. Pyne, B. Richmond, T. Ryan, E. R. Seiffert, S. Sen, L. Todd, M. C. Wiemann and A. Winkler. 2003. Oligocene mammals from Ethiopia and faunal exchange between Afro-Arabia and Eurasia. Nature 426:549-552 [J. Alroy/J. Alroy]more details
Purpose of describing collection: general faunal/floral analysis
PaleoDB collection 71941: authorized by John Alroy, entered by John Alroy on 17.05.2007, edited by Pauline Coster and Mark Uhen
Creative Commons license: CC BY (attribution)
Taxonomic list
Mammalia | |
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Bunohyrax sp. Schlosser 1910 hyrax | |
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Chilgatherium harrisi n. gen. n. sp.2
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Phiomia major n. sp.2
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aff. Palaeomastodon "sp. nov. B" Andrews 1901 proboscidean
aff. Palaeomastodon "sp. nov. A" Andrews 1901 proboscidean | |
Arsinoitherium giganteum n. sp.2
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