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Early Proterozoic granitic rocks

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Wide variety of granitic rocks, including granite, granodiorite, tonalite, quartz diorite, diorite, and gabbro. These rocks commonly are characterized by steep, northeast-striking foliation. (1600-1800 Ma)
State Arizona
Name Early Proterozoic granitic rocks
Geologic age Early Proterozoic
Lithologic constituents
Major
Igneous > Plutonic > Granitic > Tonalite (Pluton)
Igneous > Plutonic > Granitic > Granodiorite (Pluton)
Igneous > Plutonic > Granitic > Granite (Pluton)
Minor
Igneous > Plutonic > Dioritic > Diorite (Pluton)
Igneous > Plutonic > Gabbroic > Gabbro (Pluton)
Igneous > Plutonic > Dioritic > Quartz-diorite (Pluton)
Comments ~ 1.6 - 1.8 Ga
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.

Anderson, P., 1989, Stratigraphic framework, volcanic-plutonic evolution, and vertical deformation of the Proterozoic volcanic belts of central Arizona, in Jenney, J.P., and Reynolds, S.J., editors, Geologic evolution of Arizona: Arizona Ge

Conway, C.M., and Silver, L.T., 1989, Early Proterozoic rocks (1710 - 1615 Ma) in central and southeastern Arizona, in Jenney, J.P., and Reynolds, S.J., editors, Geologic evolution of Arizona: Arizona Geological Society Digest 17, p. 165-18

DeWitt, E., 1989, Geochemistry and tectonic polarity of Early Proterozoic (1700 - 1750 Ma) plutonic rocks, north-central Arizona, in Jenney, J.P., and Reynolds, S.J., editors, Geologic evolution of Arizona: Arizona Geological Society Digest
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Counties Cochise - Coconino - Gila - Graham - La Paz - Maricopa - Mohave - Pima - Pinal - Yavapai - Yuma