alkali flat deposits (TXQaf;0)

State	Texas
Name	alkali flat deposits
Geologic age	Phanerozoic \| Cenozoic \| Quaternary \| Holocene
Original map label	Qaf
Comments	alkali and salt impregnated clay, dolomite, and very fine-grained sand; some intermittent salt lakes
Primary rock type	playa
Secondary rock type	evaporite
Other rock types	clay or mud; sand; dolostone (dolomite)
Lithologic constituents	Minor Sedimentary > Carbonate > Dolostone (Bed) Unconsolidated > Fine-detrital > Silt (Bed) Unconsolidated > Fine-detrital > Clay (Bed)
Map references	Bureau of Economic Geology, 1992, Geologic Map of Texas: University of Texas at Austin, Virgil E. Barnes, project supervisor, Hartmann, B.M. and Scranton, D.F., cartography, scale 1:500,000
Unit references	Bureau of Economic Geology, 1968, Van Horn-El Paso Sheet, Geologic Atlas of Texas: Bureau of Economic Geology, The University of Texas at Austin, scale 1:250,000.
Geographic coverage	Culberson - Hudspeth