Abstract
More than 13,000 ft of Precambrian and Cambrian sedimentary rocks occur in S.-central Esmeralda County. The succession contains upper Precambrian to Upper Cambrian strata in conformable sequence and appears to be unconformably overlain by the Middle Ordovician Palmetto Formation. The Cambrian rocks are considered to include the oldest Cambrian strata in North America because of the presence of the olenellid trilobite Fallotaspis. Approximately two-thirds of the Precambrian and Lower Cambrian sedimentary rocks are quartzose detrital deposits, similar in thickness and lithologic character to strata of equivalent age in the Inyo Mountains, California. Carbonate rocks dominate the Middle and Upper Cambrian.
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