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This location is well known as the Marble Mountain
Trilobite Quarry. In the lower
Cambrian shale here, a variety of trilobites and brachiopods occurs, including
such species as Acrocephalites trifossatus, Anomocarella spatha,
Bathyuriscus maximus, Corynixochus sp., and Fremontia
The shale rests on a thin layer of Cambrian quartzite,
making the unconformity between it and the underlying Precambrian granitics
A very sparse creosote bush scrub, with Larrea
occurs in the area.
fossils, though not of particularly high quality nor in great abundance, have
been collected for a number of years and the area is frequently visited by
educational, observational. Collecting
should be permitted but commercial collecting banned.
Eventually, amateur collecting will deplete the site.
J. C. and C. H. Crickmay. 1933.
Notes on the Cambrian rocks of the eastern Mojave Desert, Calif.
Univ. of Calif. Dept. of Geol. Sci. Bull. Vol. 23, pp. 57-80.
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