bolson deposits (TXPObo;0)

State	Texas
Name	bolson deposits
Geologic age	Phanerozoic \| Cenozoic \| Tertiary \| Pliocene
Original map label	Pobo
Comments	clay, silt, sandstone, and conglomerate; finer grained material in central part, coarsens toward margins where lenses of pebbles to boulder conglomerate are common, mostly pale red to light brown; thickness in southern area up to 2,000 ft.
Primary rock type	clay or mud
Secondary rock type	silt
Other rock types	sandstone; conglomerate
Lithologic constituents	Major Unconsolidated > Fine-detrital > Clay (Alluvial) Minor Unconsolidated > Clastic > Conglomerate (Alluvial) Unconsolidated > Clastic > Sandstone (Alluvial) Unconsolidated > Fine-detrital > Silt (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, 1979, Marfa Sheet, Geologic Atlas of Texas: Bureau of Economic Geology and The University of Texas at Austin, scale 1:250,000.
Geographic coverage	Brewster