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ILLUSTRATIONS

• Page.
• PLATE XXI. Map showing the relations of the Edwards Plateau, the Balcones scarp line, and the Rio Grande Plain ...200
• XXII. Sulphur Peak, Uvalde County ...202
• XXIII. The Llano Estacado and Edwards Plateau and contiguous regions ...204
• XXIV. Round Mountain, Uvalde Count ...206
• XXV. Rio Grande Canyon and boca of Pecos Canyon ...208
• XXVI. Hillcoat Cave, Edwards County ...210
• XXVII. Pecos Canyon at the Southern Pacific Railroad bridge ...212
• XXVIII. Upper Glen Rose beds of Mount Bonnel ...222
• XXIX. Bull Creek, Travis County ...224
• X XX. Flints of Edwards limestone ...226
• XXXI. Bluff caverns in Edwards limestone, Rio Grande ...228
• XXXII. Bluff cavern in Edwards limestone, Rio Grande, interior view ...230
• XXXIII. Pyramidal buttes of Edwards limestone, Kinney County ...232
• XXXIV. Shoal Creek limestone, West Fork of the Nueces River, Kinney County ...238
• XXXV. Cross sections in the Austin quadrangle, Texas ...246
• XXXVI. Escarpment and terrace of the Rio Grande at Eagle Pass ...252
• XXXVII. Cap of Pinto Mountains ...258
• XXXVIII. Run-off of Frio (gravity) springs ...268
• XXXIX. Artesian well, City Waterworks Company, San Antonio ...278
• XL. Head of Kickapoo springs, Edwards County ...280
• XLL Sections of artesian wells, Austin and vicinity ...286
• XLII. Artesian well, City Waterworks Company, San Antonio ...290
• XLIII. Sections of artesian wells in vicinity of San Antonio ...294
• XLIV. Barton Creek, above dam, Travis County ...308
• XLV. San, Pedro springs, San Antonio ...310
• XLVI. Map of Austin and vicinity, showing the relations of springs, faults, and wells (this plate should have been numbered XLI) ...282
• XLVII. San Marcos spring ...312
• XLVIII. Natural section of old water channels in limestone bluff below Kickapoo springs ...314
• XLIX. Run-off of San Marcos spring ...316
• L. Karrenfelder, Edwards limestone ...318
• LI-LXIV. Characteristic fossils of the various formations ...322
• FIG. 53. Key map of topographic provinces of Texas ...201
• 54. Diagrammatic profile across the southern margin of the Edwards Plateau, in Edwards and Kinney counties ...207
• 55. Section at Fredericksburg ...221
• 56. Sections at Lohmann's Crossing and Hickory Creek, Colorado River... 223
• 57. Sections of Edwards limestone near Austin ...229