Quaternary surficial deposits, undivided

Unconsolidated to strongly consolidated alluvial and eolian deposits. This unit includes: coarse, poorly sorted alluvial fan and terrace deposits on middle and upper piedmonts and along large drainages; sand, silt and clay on alluvial plains and playas; and wind-blown sand deposits. (0-2 Ma)
State Arizona
Name Quaternary surficial deposits, undivided
Geologic age Quaternary
Lithologic constituents
Major
Unconsolidated > Fine-detrital > Silt (Alluvial, Eolian, Terrace-stream, Playa)
Unconsolidated > Fine-detrital > Clay (Alluvial, Eolian, Terrace-stream, Playa)
Unconsolidated > Coarse-detrital > Sand (Alluvial, Eolian, Terrace-stream, Playa)
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