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alluvium

alluvium
StateTexas
Namealluvium
Geologic agePhanerozoic | Cenozoic | Quaternary | Holocene
Original map labelQal
Commentsalluvium and low terrace deposits along streams, sand, silt, clay, and gravel. Thickness variable. The unit appears on Geologic Map of Texas on the lagoon side of barrier islands where they represent lagoon and wind-tidal-flat sand and clay. These deposits of clay and silty, clayey fine to v. fine quartz sand and shell sand accumulate on alternately dry and flooded barren flats 0.3 m below to 1 m above mean sea level. Mapped areas include active eolian sand dunes on the landward side of barrier islands.
Primary rock typesand
Secondary rock typesilt
Other rock typesclay or mud; gravel
Lithologic constituents
Major
Unconsolidated > Coarse-detrital (Alluvial)
Unconsolidated > Fine-detrital (Alluvial)
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, Austin Sheet, Geologic Atlas of Texas, University of Texas, Bureau of Economic Geology, scale 1:250,000.
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, 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, 1972, Dallas sheet, Geologic Atlas of Texas, Bureau of Economic Geology, University of Texas at Austin, 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.
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, 1968, Beaumont Sheet, Geologic Atlas of Texas, Bureau of Economic Geology, University of Texas at Austin, scale 1:250,000.
Bureau of Economic Geology, 1975, Corpus Christi Sheet, Geologic Atlas of Texas, Bureau of Economic Geology, University of Texas at Austin, scale 1:250,000.
Bureau of Economic Geology, 1975, Beeville-Bay City Sheet, Geologic Atlas of Texas, Bureau of Economic Geology, University of Texas at Austin, 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, 1982, Houston Sheet, Geologic Atlas of Texas, Bureau of Economic Geology, University of Texas at Austin, scale 1:250,000.
Geographic coverageAnderson - Andrews - Angelina - Aransas - Archer - Armstrong - Atascosa - Austin - Bastrop - Baylor - Bee - Bell - Bexar - Blanco - Borden - Bosque - Bowie - Brazoria - Brazos - Brewster - Briscoe - Brooks - Brown - Burleson - Burnet - Caldwell - Calhoun - Callahan - Cameron - Camp - Cass - Chambers - Cherokee - Childress - Clay - Coke - Coleman - Collin - Collingsworth - Colorado - Comal - Comanche - Concho - Cooke - Coryell - Cottle - Crane - Crockett - Crosby - Culberson - Dallam - Dallas - Dawson - Deaf Smith - Delta - Denton - DeWitt - Dickens - Dimmit - Donley - Duval - Eastland - Ector - Edwards - Ellis - El Paso - Erath - Falls - Fannin - Fayette - Fisher - Floyd - Foard - Fort Bend - Franklin - Freestone - Frio - Galveston - Garza - Gillespie - Glasscock - Goliad - Gonzales - Gray - Grayson - Gregg - Grimes - Guadalupe - Hale - Hall - Hamilton - Hansford - Hardeman - Hardin - Harris - Harrison - Hartley - Haskell - Hays - Hemphill - Henderson - Hidalgo - Hill - Hood - Hopkins - Houston - Howard - Hudspeth - Hunt - Hutchinson - Irion - Jack - Jackson - Jasper - Jeff Davis - Jefferson - Jim Hogg - Jim Wells - Johnson - Jones - Karnes - Kaufman - Kendall - Kenedy - Kent - Kerr - Kimble - King - Kinney - Kleberg - Knox - Lamar - Lampasas - La Salle - Lavaca - Lee - Leon - Liberty - Limestone - Live Oak - Llano - Loving - Lubbock - McCulloch - McLennan - McMullen - Madison - Marion - Martin - Mason - Matagorda - Maverick - Medina - Menard - Midland - Milam - Mills - Mitchell - Montague - Montgomery - Morris - Motley - Nacogdoches - Navarro - Newton - Nolan - Nueces - Oldham - Orange - Palo Pinto - Panola - Parker - Pecos - Polk - Potter - Presidio - Rains - Randall - Reagan - Red River - Reeves - Refugio - Roberts - Robertson - Rockwall - Runnels - Rusk - Sabine - San Augustine - San Jacinto - San Patricio - San Saba - Schleicher - Scurry - Shackelford - Shelby - Sherman - Smith - Somervell - Starr - Stephens - Sterling - Stonewall - Sutton - Tarrant - Taylor - Terrell - Throckmorton - Titus - Tom Green - Travis - Trinity - Tyler - Upshur - Upton - Uvalde - Val Verde - Van Zandt - Victoria - Walker - Waller - Ward - Washington - Webb - Wharton - Wheeler - Wichita - Wilbarger - Willacy - Williamson - Wilson - Winkler - Wise - Wood - Young - Zapata - Zavala

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