CONTENTS.

• Letter of transmittal 5
• Preface 7
• Introductory 9
  • General statement 9
  • Previous work in the Gaudalupe Mountains 9
• Part I. Reconnoissance Section across the Permian of Central Texas 11
  • Cretaceous areas 11
  • Cretaceous near Marienfiel 12
  • Carboniferous 14
  • Transition from Carboniferous to Permian 15
  • Typical Permian 16
  • Doubtful beds near Westbrooke 18
  • Erosion at south border of Llano Estacado 19
  • Probable Permian near Pecos City 20
• Part II. Geology of the Gaudalupe Mountains 21
  • General statement 21
  • Topographic Features of the Gaudalupe Region 21
    • Dark Canyon 22
    • Black River 23
    • McKitterick Canyon 23
    • Pine Canyon 26
    • Drainage on west side of the Gaudalupe 26
    • Dog Canyon 27
    • Crow Flat Valley 27
    • Springs supplied from the Mountains 29
  • Stratigraphy of the Gaudalupe Mountains 29
    • Possible Correlation 31
    • Age of the Strata 32
    • Monoclinal Structure 33
    • Probable Fault 34
    • Disturbance 34
    • Pre-Cretaceous Erosion 35
    • Quaternary Rocks 36
  • Part III. Economics of the Gaudalupe Mountain 37
    • Artesian Water 37
    • Building Stones 39
    • Minerals 39
    • Coal 39
  • Index 41