CONTENTS. 



Introductory 55 



The cretaceous sediments 56 



The Devil's River limestone 56 



Mineral occurrences 58 



Distribution 59 



The Del Rio clay 60 



Mineral occurrences 60 



Variations in thickness 61 



Geographical distribution 61 



Relation to water supply 62 



The Buda limestone 63 



Location of outcrops 63 



Possible economic importance 64 



Eagle Ford beds 64 



Geographic distribution of outcrops 65 



Bituminous contents 65 



The Austin chalk 66 



Area of outcrop 67 



Thickness of Austin chalk 68 



The Upson clay 68 



Distribution •. 68 



Physical properties 69 



Thickness 69 



The Anacacho limestone 70 



Equivalence 70 



Thickness and distribution 70 



Asphalt .' 71 



The Eagle Pass formation 72 



The San Miguel beds 72 



The coal series 74 



Section of the coal series 74' 



Thickness 75 



Distribution 75 



The Eagle Pass coal 75 



The Escondido beds 78 



The Pulliam formation 81 



The tertiary sediments 82 



Lignite 83 



Pleistocene deposists 84 



Alluvium and soil ,. 85 



Library Publications. 4. 



