Early Pleistocene to late Miocene basin deposits

Poorly sorted, variably consolidated gravel and sand that range widely in age. These sediments are generally light gray or tan. This unit is generally mapped in areas of deep late Cenozoic stream incision and landscape degradation where thin Quaternary deposits (map units Qy, Qm, Qo) discontinuously blanket older deposits (map units Tsy or Tsm) and the two cannot be differentiated at the scale of this map. (0.75-10 Ma)
State Arizona
Name Early Pleistocene to late Miocene basin deposits
Geologic age Late Pliocene to Early Pleistocene
Lithologic constituents
Major
Unconsolidated > Coarse-detrital > Gravel (Fluvial)
Unconsolidated > Coarse-detrital > Sand (Fluvial)
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.

NGMDB product
Counties Gila - Greenlee - La Paz - Maricopa - Mohave - Pima - Pinal