Xll CONTENTS. 



Part II. Economic geology — 



How to use the Report 569 



Metalliferous deposits ; 5*70 



Precious metals T . . . . 512 



Gold . 5*74 



Silver 575 



Base metals — 



Copper 577 



Lead 583 



Tin 595 



Zinc ... 602 



Manganese 602 



Iron 608 



Building stones 636 



Granites 638 



Marbles 646 



Limestone and dolomites 649 



Sandstones 651 



Slates, schists, etc 652 



Clays, cements, etc 653 



Materials for lime, mortars, etc 654 



Refractory materials 654 



Fictile materials • 655 



Part III. Supplement — 



Archean rocks 656 



Eparchean rocks 658 



Paleozoic rocks. 659 



REPORT ON THE GEOLOGY AND MINERAL RESOURCES OF TRANS-PECOS TEXAS, BY 

 W. H. VON STREERUWITZ. 



Chapter I. Definition of area included in the region 669 



Chapter II. Descriptive geology 677 



Chapter III. Mineral resources and irrigation 689 



Hunter district 691 



Bonanza district 692 



Big Gulch, or Silver King, district 695 



Zimpelman's Pass district 696 



Sierra Blanca Junction 697 



Eagle Mountains 697 



Hills between the Texas and Pacific Railway and cliffs of the Sierra Diabolo . . . 698 



Ornamental and building stones 700 



Irrigation. 701 



Development 704 



Chapter IY. Minerals of Trans-Pecos Texas 710 



Chapter Y. Report on Cretaceous deposits, by J. A. Taff 7 14 



Lower Cretaceous series 715 



Trinity division 715 



Fredericksburg division 717 



Washita division 719 



Upper Cretaceous series 732 



Lower Cross Timber or Dakota division. ...... . . . 734 



Eagle Ford or Benton Shale division 734 



Concluding remarks 737 



