Gatuna Formation (TXQg;0)

State	Texas
Name	Gatuna Formation
Geologic age	Phanerozoic \| Cenozoic \| Quaternary \| Pleistocene-Middle(?)
Original map label	Qg
Comments	Reference section of 50-100 ft of sandstone and conglomerate described in Gatuna Canyon, southeastern NM by Bachman (1976). On Pecos Sheet (1976) south of Pecos River in Reeves Co., TX unit is mostly fine friable sand, yellowish to reddish orange, red; some conglomerate, gypsum (laminated to massive, gray and red), limestone (locally with chalcedony), and siltstone, gray purplish red and shale, greenish; upper few ft calichified; 400 ft in thickness, in many places only a few ft thick.
Primary rock type	sand
Secondary rock type	conglomerate
Other rock types	evaporite; limestone; siltstone; shale
Lithologic constituents	Major Unconsolidated > Coarse-detrital (Bed) Minor Unconsolidated > Fine-detrital (Bed) Incidental Sedimentary > Chemical > Evaporite > Gypsum (Bed)gypsum Sedimentary > Carbonate > Limestone (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	Bachman, G.O., 1976, Cenozoic deposits of southeastern New Mexico and an outline of the history of evaporite dissolution: U.S. Geological Survey, Journal of Research v. 4, no. 2, p. 135-149. Izett, G.A., and Wilcox, R.E., 1982, Map showing localities and inferred distributions of the Huckleberry Ridge, Mesa Falls, and Lava Creek ash beds . . .in the western United States and southern Cananda: U.S. Geological Survey Miscellaneous Investigatio [http://pubs.er.usgs.gov/publication/i1325] Bureau of Economic Geology, 1976, Hobbs Sheet, Geologic Atlas of Texas: University of Texas at Austin, Bureau of Economic Geology, scale 1:250,000. 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. Bureau of Economic Geology, 1976, Pecos Sheet, Geologic Atlas of Texas: University of Texas at Austin, Bureau of Economic Geology, scale 1:250,000.
Geographic coverage	Crane - Crockett - Loving - Pecos - Reeves - Ward