Map of Texas biotic provinces based on the distribution of plant and animal communities. As shown, Kincaid Shelter lies in an ecotone or transition zone between the semi-arid, thorny brushlands of the Tamaulipan province and the oak-juniper savannas of the Balconian province. This mosaic of environments with diverse resources likely made the area attractive to prehistoric hunters and gatherers. Map courtesy Lyndon B. Johnson School of Public Affairs.
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