Blackwater Draw Formation

Blackwater Draw Formation
State Texas
Name Blackwater Draw Formation
Geologic age Pleistocene
Lithologic constituents
Major
Unconsolidated > Coarse-detrital > Sand (Bed)
Minor
Unconsolidated > Fine-detrital (Bed)
Incidental
Unconsolidated > Fine-detrital > Silt (Bed)
Comments Sand, fine- to medium-grained quartz, silty, calcareous, locally clayey, caliche nodules, massive, grayish red; distinct soil profile; thickness as much as 25 ft. feathers out locally.
References

Bureau of Economic Geology, 1977, Clovis Sheet, Geologic Atlas of Texas, Bureau of Economic Geology, University of Texas at Austin, scale 1:250,000.

Bureau of Economic Geology, 1983, Tucumcari Sheet, Geologic Atlas of Texas, Bureau of Economic Geology, University of Texas at Austin, scale 1:250,000.

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.

NGMDB product
Counties Andrews - Armstrong - Bailey - Borden - Briscoe - Carson - Castro - Cochran - Crane - Crosby - Dallam - Dawson - Deaf Smith - Dickens - Donley - Ector - Floyd - Gaines - Garza - Glasscock - Gray - Hale - Hansford - Hartley - Hemphill - Hockley - Howard - Hutchinson - Lamb - Lipscomb - Lubbock - Lynn - Martin - Midland - Moore - Motley - Ochiltree - Oldham - Parmer - Potter - Randall - Reagan - Roberts - Sherman - Sterling - Swisher - Terry - Upton - Wheeler - Winkler - Yoakum