Holocene surficial deposits

Unconsolidated deposits associated with modern fluvial systems. This unit consists primarily of fine-grained, well-sorted sediment on alluvial plains, but also includes gravelly channel, terrace, and alluvial fan deposits on middle and upper piedmonts. (0-10 ka)
State Arizona
Name Holocene surficial deposits
Geologic age Holocene
Lithologic constituents
Unconsolidated > Fine-detrital > Silt (Fluvial)
Unconsolidated > Fine-detrital > Clay (Fluvial)
Unconsolidated > Coarse-detrital > Sand (Alluvial, Terrace-stream)
Unconsolidated > Coarse-detrital > Gravel (Alluvial, Terrace-stream)
Comments Associated with modern fluvial systems

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 - Yavapai - Yuma