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OFM0221D. Geologic Map of the Pace Bend Quadrangle, Texas, by C. M. Woodruff, Jr., and E. W. Collins. Oversize color map on topographic base, map scale 1:24,000. Includes a cross section, 2015. Downloadable PDF. For paper map: OFM0221.
Keywords: maps, geologic maps, quadrangle maps, Pace Bend, Texas
About This Quadrangle
The Pace Bend Quadrangle lies mostly within Travis County but also includes southeastern parts of Burnet County. Landscape in the map area consists of rolling terrain formed on diverse substrate (sandstone, conglomerate, limestone, and local shale). High ground is underlain by hard and soft limestone strata, sculpted into stepped terrain typical of the Central Texas Hill Country. Quaternary alluvial deposits (sand, gravel, silt, and clay) occur as terraces at or above lake level and as discontinuous valley deposits along tributary streams. Quaternary colluvial deposits occur along steep lakeside bluffs that represent areas of potentially unstable slopes. All of the relatively recent (Quaternary)deposits are of localized areal extent, whereas most of the map comprises basal parts of the Cretaceous section in Central Texas. The sequence of Cretaceous bedrock units makes up the three parts of the Trinity Aquifer, an important source of groundwater across the Hill Country region.
Woodruff, C. M., Jr., and Collins, E. W., 2015, Geologic Map of the Pace Bend Quadrangle, Texas: The University of Texas at Austin, Bureau of Economic Geology, Open-File Map No. 221, map scale 1:24,000.