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Middle Miocene to Oligocene granitic rocks

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Granite to diorite representing solidified magma chambers that were the likely source of overlying and nearby volcanic rocks of map unit Tv. The granitic rocks are typically equigranular and fine- to medium-grained. (14-26 Ma)
State Arizona
Name Middle Miocene to Oligocene granitic rocks
Geologic age Oligocene to Middle Miocene
Lithologic constituents
Major
Igneous > Plutonic > Granitic > Granodiorite (Pluton)
Igneous > Plutonic > Dioritic > Diorite (Pluton)
Igneous > Plutonic > Granitic > Granite (Pluton)
Minor
Igneous > Plutonic > Dioritic > Quartz-diorite (Pluton)
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 Diges

Spencer, 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 Cochise - Graham - La Paz - Maricopa - Mohave - Pima - Pinal - Santa Cruz - Yuma