20210901 17434100 1.0 TRUE TRUE TXKarst_USGS Texas portion of a 2014 USGS karst dataset for the whole USA. Karst Pseudokarst Texas TPWD USGS Texas portion of a 2014 USGS karst dataset for the whole USA Texas portion of the original 2014 USGS karst data set for the whole USA was extracted by Texas Parks and Wildlife Department. Original data for this map were compiled and edited by David J. Weary and Daniel H. Doctor of the U.S. Geological Survey (USGS). Most of the spatial data compiled in this project originated as lithologic map units on geologic maps produced by various State geological surveys. Versions of the original source maps are available for purchase or download from the respective State geological surveys. Much of the digital map data for this project was compiled from a series of integrated geologic map databases for the United States produced by the USGS Mineral Resources Program (see http://mrdata.usgs.gov/geology/state/, accessed May 16, 2014). Use of the USGS digital geologic data provided a consistent data structure within which a derivative database of areas with potential for karst could be constructed. In some areas, other miscellaneous datasets and publications were referenced to facilitate accurate map compilation. These references are cited in the COMMENTS field of the feature data. No claims are made to the suitability of these data for any particular use. 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