Holocene river alluvium

Unconsolidated to weakly consolidated sand and gravel in river channels and sand, silt, and clay on floodplains. Also includes young terrace deposits fringing floodplains. (0-10 ka)
State Arizona
Name Holocene river alluvium
Geologic age Holocene
Lithologic constituents
Unconsolidated > Coarse-detrital > Sand (Fluvial, Terrace-stream)
Unconsolidated > Coarse-detrital > Gravel (Fluvial, Terrace-stream)
Unconsolidated > Fine-detrital > Silt (Fluvial, Terrace-stream)
Unconsolidated > Fine-detrital > Clay (Fluvial, Terrace-stream)

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 Cochise - Gila - La Paz - Maricopa - Mohave - Pima - Pinal - Santa Cruz - Yavapai - Yuma