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The AAPG/Datapages Combined Publications Database

AAPG Bulletin


Volume: 59 (1975)

Issue: 6. (June)

First Page: 1010

Last Page: 1014

Title: Evaluation of Brachiopod Faunas from Solis Limestone (Ordovician, Silurian, and Lower Devonian), Chihuahua, Mexico: GEOLOGIC NOTES

Author(s): Peter M. Sheehan (2)


The Solis Limestone in Chihuahua, Mexico, was deposited across the margin of the Ouachita geosyncline. The northern part of the formation was deposited on a carbonate platform, the southern part on a slope leading into the Ouachita trough. An evaluation of the brachiopod faunas provides the basis for revision of correlations of the formation. On the north, in the Cerro de Placer de Guadalupe section, the formation is a thick sequence of Upper Ordovician and Silurian, relatively clean dolomitic limestone. Apparently these rocks were laterally continuous with the Fusselman Dolomite in Texas and New Mexico. In sections on the south the Upper Ordovician and Silurian part of the Solis Limestone is much thinner and is an argillaceous limestone; the major part of the formation h re is Early Devonian.

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