Early Pleistocene to latest Pliocene surficial deposits

Coarse relict alluvial fan deposits that form rounded ridges or flat, isolated surfaces that are moderately to deeply incised by streams. These deposits are generally topographically high and have undergone substantial erosion. Deposits are moderately to strongly consolidated, and commonly contain coarser grained sediment than younger deposits in the same area. (0.75-3 Ma)
State Arizona
Name Early Pleistocene to latest Pliocene surficial deposits
Geologic age Late Pliocene to Early Pleistocene
Lithologic constituents
Major
Unconsolidated > Coarse-detrital > Gravel (Alluvial)
Unconsolidated > Coarse-detrital > Sand (Alluvial)
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 Apache - Cochise - Coconino - Gila - Graham - Greenlee - La Paz - Maricopa - Mohave - Navajo - Pima - Pinal - Santa Cruz - Yavapai - Yuma