Abstract

RADIOLARIAN FAUNA FROM THE UPPER CRETACEOUS OF THE TESLA QUADRANGLE MIDDLE CALIFORNIA

BY ARTHUR S. CAMPBELL AND BRUCE L. CLARK

This paper describes a radiolarian fauna (approximately 100 species) which was obtained from about 1 cubic inch of limestone, given to the writers by Dr. Arthur Huey. The sample came from near the top of a series of shales mapped by Anderson and Pack as Moreno, but these shales are somewhat older than those of the type section of the Moreno.

Nine families are represented by 25 genera in this fauna. It may be referred to as a Saturnalis fauna, so called because of the prominence of that genus and of related genera. These are ring-bearing forms which are rare in Tertiary strata. No Tertiary or recent species of Radiolaria have been recognized in this fauna.

The presence of a number of very large and generally coarse species of radiolarians; . . .

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