Permian-Triassic boundary at El Antimonio, Sonora, Mexico
Vol. 14 No. 2 (1997), Regular Papers
Vol. 14 No. 2 (1997)

Permian-Triassic boundary at El Antimonio, Sonora, Mexico

Regular Papers
Published 2018-12-13
Spencer G. Lucas
New Mexico Museum of Natural History and Science, New Mexico
Barry S. Kues
Department of Earth and Planetary Sciences, University of New Mexico, New Mexico
John W. Estep
New Mexico Museum of Natural History and Science, New Mexico
Carlos M. González-León
Estación Regional del Noroeste, Instituto de Geología, Universidad Nacional Autónoma de México, Hermosillo, Sonora, México
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Keywords

Permian-Triassic boundary, Sonora, Mexico.

How to Cite

Lucas, S. G., Kues, B. S., Estep, J. W., & González-León, C. M. (2018). Permian-Triassic boundary at El Antimonio, Sonora, Mexico. Revista Mexicana De Ciencias Geológicas, 14(2), 149–154. Retrieved from https://rmcg.geociencias.unam.mx/index.php/rmcg/article/view/1116
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Abstract

Newly discovered fossils indicate the Permian-Triassic boundary is in the lower Antimonio Formation. A brachiopod-dominated assemblage collected 40 m above the Monos-Antimonio Formations contact indicates a middle Permian (Guadalupian) age, and ammonites and conodonts found 380 to 530 m above the base of the Antimonio Formation indicate an Early Triassic (Spathian) age… in order to continue, download the full paper in PDF.

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