Sparta Sand (TXEOs;0)

State	Texas
Name	Sparta Sand
Geologic age	Phanerozoic \| Cenozoic \| Tertiary \| Eocene
Original map label	Es
Comments	Quartz sand, v. fine to fine grained, lt. gray, v. pale orange, grayish-brn to brownish-gray, sl. cohesive from silt and clay matrix, massive, locally crossbedded, well sorted, micaceous, interbeds of sandy or silty clay, locally carbonaceous; some hard, brown ferruginous sandstone near base; lignite beds locally present near top, 130 +-ft thick in San Antonio Sheet (1974), 130-150 ft in Seguin Sheet (1974), 150-250 ft in Crystal City-Eagle Pass Sheet (1976)170 +-ft thick in Tyler Sheet (1964), 50+- ft in Texarkana Sheet (1966)..
Primary rock type	sand
Secondary rock type	clay or mud
Other rock types	silt; sandstone; coal
Lithologic constituents	Major Sedimentary > Clastic > Sandstone (Bed) Minor Sedimentary > Clastic > Mudstone > Claystone (Bed) Sedimentary > Clastic > Siltstone (Bed) Incidental Sedimentary > Clastic > Sandstone (Bed) Sedimentary > Coal (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, 1974, San Antonio Sheet, Geologic Atlas of Texas, University of Texas, Bureau of Economic Geology, scale 1:250,000. Bureau of Economic Geology, 1974, Seguin Sheet, Geologic Atlas of Texas, University of Texas, Bureau of Economic Geology, scale 1:250,000. Bureau of Economic Geology, 1976, Crystal City-Eagle Pass Sheet, Geologic Atlas of Texas, University of Texas, Bureau of Economic Geology, scale 1:250,000. Bureau of Economic Geology, 1965, Tyler sheet, Geologic Atlas of Texas, Bureau of Economic Geology, University of Texas at Austin, scale 1:250,000. Bureau of Economic Geology, 1966, Texarkana Sheet, Geologic Atlas of Texas, University of Texas, Bureau of Economic Geology, scale 1:250,000. Bureau of Economic Geology, 1967, Palestine Sheet, Geologic Atlas of Texas, Bureau of Economic Geology, University of Texas at Austin, scale 1:250,000.
Geographic coverage	Anderson - Angelina - Atascosa - Bastrop - Blanco - Brazos - Burleson - Camp - Cass - Cherokee - Fayette - Frio - Gillespie - Gonzales - Harrison - Henderson - Houston - Kimble - Lee - Leon - Marion - Mason - Menard - Milam - Morris - Nacogdoches - Robertson - Rusk - Sabine - San Augustine - Shelby - Smith - Upshur - Van Zandt - Wilson - Wood