THE 



JOURNAL OF GEOLOGY 



SEPTEMBER-OCTOBER, 1894. 



THE CENOZOIC DEPOSITS OF TEXAS. 



The purpose of this paper is to give a brief account of the 

 Cenozoic deposits of Texas as they are now understood, and to 

 make such correlation of the various horizons as may appear to 

 be warranted by the stratigraphical position and fossil contents. 



The statements are based, partly on my own field work, partly 

 on that of other members of the survey, and the paleontological 

 studies of Cope, Harris, and Cragin, the details of which have 

 been given in previous publications or will appear in the Fifth 

 Annual Report of the Geological Survey. 



Eocene. 



So far as known, all of the deposits referable to the Eocene 

 Tertiary in Texas are confined to the Coastal Slope. They have 

 been divided as follows : 



3 c/ Frio clays. 



2,c Fayette sands. 



3^ Yegua clays. 



3 a Marine beds. 



2 Lignitic beds. 



1 Will's Point or Basal clays. 



Basal Clays. — The basal beds of the Eocene consist of stiff 

 laminated clay, yellow, red, blue or bluish green in color, with 

 some laminae and beds of sand, boulders and indurated strata of 

 calcareous material, containing in places many fragments of 

 shells. The boulders are irregularly distributed through the 

 clay, and sometimes form continuous bands for considerable dis- 

 tances, as in the vicinity of Tehuacana. Another phase assumed 

 Vol. II., No. 6. 549 



