State | Arizona |
---|---|
Name | Jurassic volcanic rocks |
Geologic age | Jurassic |
Lithologic constituents |
Major
Sedimentary > Clastic > Conglomerate
Igneous > Volcanic > Felsic-volcanic > Rhyolite (Pyroclastic-tuff)
Sedimentary > Clastic > Sandstone
Minor
Metamorphic > Metasedimentary > Metaclastic > Quartzite
|
Comments | The Jurassic quartz porphyry, Ali Molina, Mt Wrightson, Cobre Ridge, Black Rock volcanics, Planet Volcanics. |
Stratigraphic units | Ali Molina Formation, Topawa Group, Mount Wrightson Formation, Canelo Hills Volcanics, Cobre Ridge Tuff, Black Rock volcanics, Planet Volcanics |
References | Richard, S.M., Reynolds, S.J., Spencer, J.E., and Pearthree, P.A., 2000, Geologic Map of Arizona: Arizona Geological Survey Map 35, 1 sheet, scale 1:1,000,000.Tosdal R.M., Haxel, G.B., and Wright, J.E., 1989, Jurassic geology of the Sonoran Desert region, southern Arizona, southeastern California, and northernmost Sonora: Construction of a continental-margin magmatic arc, in Jenney, J.P., and Rey |
NGMDB product | |
Counties | Cochise - La Paz - Mohave - Pima - Santa Cruz |