State | Arizona |
---|---|
Name | Middle Miocene to Oligocene shallow intrusions |
Geologic age | Oligocene to Middle Miocene |
Lithologic constituents | Major
Igneous > Hypabyssal > Felsic-hypabyssal > Hypabyssal-rhyolite (Dike or sill)
Igneous > Hypabyssal > Felsic-hypabyssal > Hypabyssal-dacite (Dike or sill)
Igneous > Volcanic > Mafic-volcanic (Pyroclastic-tuff, Volcaniclastic-volcanic breccia)The unit consists of mafic tuff, breccia and shallow intrusions at Buell Park in northeastern Arizona.
|
Comments | Includes Navajo volcanic field minettes |
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.Nealey, L.D., and Sheridan, M.F., 1989, Post-Laramide volcanic rocks of Arizona and northern Sonora, Mexico, and their inclusions, in Jenney, J.P., and Reynolds, S.J., editors, Geologic evolution of Arizona: Arizona Geological Society DigesSpencer, J.E., and Reynolds, S.J., 1989, Middle Tertiary tectonics of Arizona and adjacent areas, in Jenney, J.P., and Reynolds, S.J., editors, Geologic evolution of Arizona: Arizona Geological Society Digest 17, p. 539-574. |
NGMDB product | |
Counties | Apache - Cochise - Graham - La Paz - Maricopa - Mohave - Pima - Yuma |