Paleontology of the Stringocephalus biostrome, Piute Formation (Midddle Devonian), Arrow Canyon Range, Clark County, Nevada

Acid reduction of 300 pounds of selected silicified material from the prominent Stringocephalus biosstrome in the Piute Formation has yielded: Actinostroma sp., Idiostroma sp., Thamnopora limitaris, Temnophllum waltheri n. sp., Gypidula (Gypidula) sp., Stringocephalus nevadensis n. sp., Rensselandia cloudi n. sp., Rensselandia sp., Spinatrypa cf. S. aspera, Ladjia cordillera n. sp. Satisfactory ecologic interpretation of the Stringocephalus biostrome must explain the extremely wide distribution of similar features in eastern Nevada and western Utah, restriction of such deposits to a narrow stratigraphic range, the great abundance of individuals of very few species, etc. Apparently the biostrome resulted from preservation of a short-lived, ecologically restricted assemblage in a clinoform deposit.

This record provided courtesy of AGI/GeoRef.

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