Frozen Point and Caplen Quadrangles, Texas Gulf of Mexico Coast. Digital Download

OFM0249D. Geologic Map of the Frozen Point and Caplen Quadrangles, Texas Gulf of Mexico Coast by Caudle, T.L., and Paine, J. G..  Oversize geologic map on color topographic base, map scale 1:24,000. Downloadable PDF. To purchase a paper copy of this map, order OFM0249.

About This Publication
Photography used in the study was 1-m resolution, natural color, National Agricultural Inventory Program digital imagery photographed in 2016 and 60-cm resolution, natural color, National Agricultural Inventory Program digital imagery photographed in 2018 and 2020. Photography was obtained from Texas Natural Resources Information System (TNRIS). Photography was supplemented by a 50-cm cell size digital elevation model (DEM) constructed from topographic data acquired during an airborne lidar survey flown by Fugro USA Land, Inc. in 2018 for the Texas Natural Resources Information System (TNRIS), Texas Water Development Board (TWDB), and Houston-Galveston Area Council (H-GAC) as part of the Texas Strategic Mapping (StratMap) program and 1-m-cell-size DEMs constructed from topographic data acquired during lidar surveys flown by the Bureau of Economic Geology in 2012 and 2019. Previous regional maps that cover this area include the 1:250,000-scale Geologic Atlas of Texas, Houston Sheet (Aronow and others, 1968; revised 1982), the 1:125,000-scale Environmental Geologic Atlas, Galveston-Houston Sheet (Fisher and others, 1972), and the 1:125,000-scale Distribution of Wetlands and Benthic Macroinvertebrates map (White and others, 1985).

The study included field observations of surficial deposits and contacts and interpretation of surface and subsurface electrical conductivities measured using ground-based electromagnetic induction conductivity meters (Geonics EM31 and EM38, McNeill,1980a,b). Digital elevation contour files for generalized topography were adapted from USGS topographic data obtained from TNRIS. Digital files of Texas Department of Transportation roads were also obtained through TNRIS. Water bodies were adapted from aerial photographs and the lidar-derived DEM. Geologic cross-section constructed from State of Texas well reports downloaded from the Texas Water Development Board’s (TWDB) Groundwater Database (https://www.twdb.texas.gov/groundwater/data/drillersdb.asp). Well locations are labeled with the well report number

Keywords:  maps, geologic maps, Gulf of Mexico, Texas

Citation
Caudle, T.L., and Paine, J.G., 2021: The University of Texas at Austin, Bureau of Economic Geology Open-File Map No. 249, scale 1:24,000.