11 дек. 2023 г. · Virginia's Valley and Ridge Province, where most of the state's karst is found, consists mainly of sandstone, shale, limestone, and dolomite, ... |
Karst Areas data set was developed by the Virginia Division of Geology and Mineral Resources to depict areas of karst as defined by the presence of sinkholes. |
3 мар. 2017 г. · ... Karst Features of the Northern Valley and Ridge Province, Virginia: Virginia Division of Mineral Resources Publication 44, 1:250,000-scale map. |
19 дек. 2019 г. · This map shows the outcrop of these carbonate units and the tax districts in which they occur. It is based on WVGES publications and more recent field ... |
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