Al Osoge Ploin»-Old scarped ploini beveling faintly inclined strata; mainstreams intrenched. B Greol Plains Province Bl High Plains Brood intervotley remnants of smooth fluviolile plains 62 Plains Border-Submoturely to maturely dissected plateau. 63 Pecos Volley-Late mature to old plain. B4 Edwards Plateau-Young plateau with mature margin of moderate to strong relief B5 Central Texas Section-Plateau in molurity and lole stage of erosion C Coastal Plain Province Cl West Gulf Coastal Ploin-Young grading inland to mature coastal plain D Basin and range Province-BlocK mountains and desert plains Approximate boundary of the Permian Basin (23 Area covered by this report Sites of brine-discharge features Afler Fennemon and Johnson 1946 FIGURE I-Map of the Permian Basin showing physiographic divisions, sites of brine discharge, and the area covered by this report
Volcanic rocks _____________________________________ _ Monchiquite province __________________________ _ Minette province ______________________________ _ Basalt province ________________________________ _ Hydrology of the volcanic rocks _____________________ _ Diatremes ____________________________________ _ Chemical quality of the ground water ____________ _ Development of ground water ___________________ _ Literature cited ___________________________________-_ ILLUSTRATIONS FRONTISPIECE. Photograph of Boundary Butte, one of the isolated volcanic necks in the Navajo country. PLATE 1. Map showing distribution of the Cenozoic igneous rocks and the location of selected wells and springs, Navajo
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