Monola Formation

The Monola Formation is a geologic formation in California. It preserves fossils dating back to the Cambrian period.

Geology The Monola Formation is primarily composed of siliceous shales, and greyish-black clay shale, and calcareous siltstone. In parts of the siliceous shale, there are occasional layers of lime mudstone and bioclastic limestone.

Paleobiota The Monola Limestone contains a small collection of trilobites, like Glosopleura and Alokistocare.

Arthropoda

GenusSpeciesNotesImagesAlokistocare Alokistocare sp.Ptychoparid trilobite.Syspacephalus Syspacephalus sp.Ptychoparid trilobite.Paraantagmus P. latusPtychoparid trilobite.Amecephalus A. arrojosensisPtychoparid trilobite.Mexicella M. robustaPtychoparid trilobite.Onchocephalites O. laevis O. resseriPtychoparid trilobite.Syspacephalus S. variosus S. granulosus (?)Ptychoparid trilobite.Tonopahella T. goldfieldensis T. walcotii (?)Ptychoparid trilobite.Nyella (?) N. (?) planaPtychoparid trilobite.Glossopleura Glossopleura sp.Corynexochid trilobite.Oryctocephalus Oryctocephalus sp. O. orientalis O. indicus O. nyensisCorynexochid trilobite.Microryctocara M. nevadensisCorynexochid trilobite.Bathyuriscus Bathyuriscus sp.Corynexochid trilobite, previously reported as Wenkchemnia sulcata and W. spinicollis.Ogygopsis Ogygopsis sp.Dorypygid trilobite.

See also

List of fossiliferous stratigraphic units in California Paleontology in California

References