Fauna of the Permian rocks near Quinn River Crossing, Nevada

Graduation date: 1964The Permian rocks near Quinn River Crossing, Humboldt County,\ud Nevada, crop out as a north-trending block-faulted ridge and consist\ud of more than 2600 feet of middle Permian fossiliferous limestone.\ud About 1000 feet of unfossiliferous cherty shales, sandstones, and\ud conglomerates are associated with the limestone and are assumed also\ud to be of Permian age. In addition, tertiary igneous rocks make up\ud part of the ridge.\ud Normal faults transect the ridge at several localities along\ud its 9500-foot length, and some of the beds have been folded.\ud The fauna of the limestone is middle and upper Leonardian in\ud age and consists mainly of fusulinids and associated small Foraminifera,\ud solitary and colonial corals, bryozoans, and brachiopods.\ud The fusulinid fauna is described and illustrated as are two corals\ud and one bryozoan.\ud The fusulinid fauna is considered to be correlative, at least\ud in part, with that of the Coyote Butte Formation in central Oregon,\ud the upper part of the McCloud Formation in northern California, the\ud middle part of the Owens Valley Formation in east central California,\ud and the upper part of the lower limestone member of the Garden Valley\ud Formation and the upper part of the Carbon Ridge Formation in east\ud central Nevada. The fusulinids are believed to be somewhat older\ud than those of the lower Nosoni Formation in northern California and\ud the second member of the Garden Valley Formation in east central\ud Nevada