Cretaceous marine rocks (in part nonmarine), unit 3 (Mescal Range)

Undivided Cretaceous sandstone, shale, and conglomerate; minor nonmarine rocks in Peninsular Ranges
State California
Name Cretaceous marine rocks (in part nonmarine), unit 3 (Mescal Range)
Geologic age Middle Jurassic to late Early Cretaceous
Lithologic constituents
Major
Igneous > Volcanic > Felsic-volcanic (Pyroclastic)Includes welded tuff and tuff breccia
Minor
Igneous > Volcanic > Mafic-volcanic > Basalt (Flow)Forms basal part of unit
Incidental
Sedimentary > Clastic > Sandstone (Bed)Volcanic sandstone
Sedimentary > Clastic > Mudstone (Bed)
Sedimentary > Clastic > Siltstone (Bed)
Comments Eastern Mojave Desert (Mescal Range). Small area consisting mainly of volcanic rocks that overlie Jurassic Aztec Sandstone
Stratigraphic units Mountain Pass Rhyolite, "Delfonte volcanics"
References

Jennings, C.W., Strand, R.G., Rogers, T.H., Boylan, R.T., Moar, R.R., and Switzer, R.A., 1977, Geologic Map of California: California Division of Mines and Geology, Geologic Data Map 2, scale 1:750,000.

Jennings, C.W., 1985, An explanatory text to accompany the 1:750,000 scale fault and geologic maps of California: California Division of Mines and Geology, Bulletin 201, 197 p.

Jennings, C.W., 1961, Geologic map of California, Olaf P. Jenkins edition, Kingman sheet, scale 1:250,000.

Fleck, R.J., Mattinson, J.M., Busby, C.J., Carr, M.D., Davis, G.A., and Burchfiel, B.C., 1994, Isotopic complexities and the age of the Delfonte volcanic rocks, eastern Mescal Range, southeastern California: Geological Society of America Bulletin, v. 106, p. 1242-1253.

NGMDB product
Counties San Bernardino