The faunas of the Riley formation in central Texas

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Palmer, Allison R.

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University of Texas at Austin. Bureau of Economic Geology


Sixty-eight species of trilobites, 10 species of inarticulate brachiopods, two species of articulate brachiopods, one ostracode and fragments of sponges, pelmatozoan echinoderms and unidentifiable organisms constitute the faunas of the Riley formation. The fossils were collected from eight measured sections around the periphery of the outcrop area in Mason, Gillespie, Blanco, Burnet, Llano and SanSaba counties, Texas. All of the fossils are described and illustrated by stereophotographs. Two families, four genera and 16 species of trilobites, and three genera and five species of brachiopods are described as new.


To obtain a print version of this publication visit: and search for: RI0024. Based on thesis, University of Minnesota. "Reprinted from Journal of paleontology, vol. 28, no. 6, November 1954."

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