Middle Miocene to Oligocene shallow intrusions (AZTi;0)

State	Arizona
Name	Middle Miocene to Oligocene shallow intrusions
Geologic age	Oligocene to Middle Miocene
Original map label	Ti
Comments	Includes Navajo volcanic field minettes
Primary rock type	dacite
Secondary rock type	rhyolite
Other rock types	porphyry; rhyolite; conglomerate; sandstone; sedimentary breccia
Lithologic constituents	Major Igneous > Hypabyssal > Felsic-hypabyssal > Hypabyssal-rhyolite (Stock or pipe)includes rhyolite porphyry Igneous > Hypabyssal > Felsic-hypabyssal > Hypabyssal-dacite (Stock or pipe)includes dacite porphyry Minor Igneous > Hypabyssal > Felsic-hypabyssal > Hypabyssal-rhyolite (Dike or sill)includes rhyolite porphyry Igneous > Hypabyssal > Felsic-hypabyssal > Hypabyssal-dacite (Dike or sill)includes dacite porphyry Incidental Igneous > Plutonic > Dioritic > Quartz-diorite (Stock or pipe) Igneous > Plutonic > Dioritic > Quartz-diorite (Dike or sill) Igneous > Hypabyssal > Mafic-hypabyssal > Hypabyssal-mafic-alkaline (Stock or pipe)leucitite Igneous > Hypabyssal > Mafic-hypabyssal > Hypabyssal-mafic-alkaline (Dike or sill)leucitite Igneous > Hypabyssal > Lamprophyre (Stock or pipe)alnite, katungite, vogesite, minette, monchiquite, serpentinized ultramafic breccia, shonkinite Igneous > Hypabyssal > Lamprophyre (Dike or sill)alnite, katungite, vogesite, minette, monchiquite, serpentinized ultramafic breccia, shonkinite
Map 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.
Unit 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.
Geographic coverage	Apache - Cochise - Graham - La Paz - Maricopa - Mohave - Pima - Yuma