The rocks exposed in the Austin West quadrangle are Cretaceous marine limestones and clays and Quaternary alluvial deposits.

Geologic map that depicts the surface geology of Galveston and Chambers Counties and parts of Waller, Harris, Liberty, Jefferson, Orange, Brazoria, Matagorda, Wharton, and Fort Bend Counties.

Paleoenvironmental analysis of the alternating beds of the basal Cretaceous Glen Rose Formation in Central Texas indicates a cyclical alternation of subtidal through supratidal facies.

Geologic map that depicts the surface geology of Montgomery, San Jacinto, and Hardin Counties and parts of Madison, Trinity, Polk, Tyler, Jasper, Newton, Orange, Jefferson, Liberty, Harris, Waller, Grimes, Walker, and Robertson Counties.