Holocene river alluvium (AZQr;0)

State	Arizona
Name	Holocene river alluvium
Geologic age	Holocene
Original map label	Qr
Primary rock type	sand
Secondary rock type	gravel
Other rock types	mud; silt
Lithologic constituents	Minor Unconsolidated > Coarse-detrital > Sand (Terrace, stream) Unconsolidated > Coarse-detrital > Sand (Fluvial) Unconsolidated > Coarse-detrital > Gravel (Terrace, stream) Unconsolidated > Coarse-detrital > Gravel (Fluvial) Incidental Unconsolidated > Fine-detrital > Clay (Terrace, stream) Unconsolidated > Fine-detrital > Clay (Fluvial) Unconsolidated > Fine-detrital > Silt (Terrace, stream) Unconsolidated > Fine-detrital > Silt (Fluvial)
Map 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.
Unit 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.
Geographic coverage	Cochise - Gila - La Paz - Maricopa - Mohave - Pima - Pinal - Santa Cruz - Yavapai - Yuma