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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)
StateArizona
NameQuaternary surficial deposits, undivided
Geologic ageQuaternary
Original map labelQ
Primary rock typesand
Secondary rock typegravel
Other rock typesmud; silt
Lithologic constituents
Minor
Unconsolidated > Fine-detrital > Silt (Fluvial)
Unconsolidated > Fine-detrital > Silt (Alluvial)
Unconsolidated > Coarse-detrital > Sand (Fluvial)
Unconsolidated > Coarse-detrital > Sand (Alluvial)
Unconsolidated > Coarse-detrital > Gravel (Fluvial)
Unconsolidated > Coarse-detrital > Gravel (Alluvial)
Incidental
Unconsolidated > Fine-detrital > Clay (Lacustrine)
Unconsolidated > Fine-detrital > Clay (Terrace, stream)
Unconsolidated > Fine-detrital > Clay (Alluvial)
Unconsolidated > Fine-detrital > Clay (Fluvial)
Unconsolidated > Fine-detrital > Silt (Eolian)
Unconsolidated > Fine-detrital > Silt (Lacustrine)
Unconsolidated > Fine-detrital > Silt (Terrace, stream)
Unconsolidated > Coarse-detrital > Sand (Lacustrine)
Unconsolidated > Coarse-detrital > Sand (Terrace, stream)
Unconsolidated > Coarse-detrital > Sand (Eolian)
Unconsolidated > Coarse-detrital > Sand (Colluvial)
Unconsolidated > Coarse-detrital > Gravel (Terrace, stream)
Unconsolidated > Coarse-detrital > Gravel (Landslide)
Unconsolidated > Coarse-detrital > Gravel (Mass wasting)
Unconsolidated > Coarse-detrital > Gravel (Colluvial)
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 coverageApache - Cochise - Coconino - Gila - Graham - Greenlee - La Paz - Maricopa - Mohave - Navajo - Pima - Pinal - Santa Cruz - Yavapai - Yuma

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