barrier island deposits (TXQbb;0)

State	Texas
Name	barrier island deposits
Geologic age	Phanerozoic \| Cenozoic \| Quaternary
Original map label	Qbb
Comments	mostly fine-grainded sand, shells scarce; surface slightly higher than that of surrounding deposits, characterized by numerous pimple mounds and poorly defined relict beach ridges; includes many Recent, locally active sand dunes; probably part of "Ingleside" barrier island system; thickness less than 60 ft.
Primary rock type	sand
Secondary rock type	silt
Other rock types
Lithologic constituents	Major Unconsolidated > Coarse-detrital > Sand (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, 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, 1982, Houston Sheet, Geologic Atlas of Texas, Bureau of Economic Geology, University of Texas at Austin, scale 1:250,000.
Geographic coverage	Aransas - Brazoria - Calhoun - Chambers - Jefferson - Kleberg - Nueces - Orange - Refugio - San Patricio