456 E. T. DUMBLE PROBLEM OF TEXAS TERTIARY SANDS 



Biirkeville, Newton County, "where a brackish-water Oligocene fauna has 

 been found," lie correlates the Fleming beds, as well as most of the Cor- 

 ligan sands, with the Oligocene. 



This discovery of Jackson fossils l)y Veateh seemed to cast a doubt on 

 Harris' earlier correlation of the Corrigan sands with the Fayette and 

 an effort was made to get the facts. It was found that there was a body 

 of sand crossing the line of road south of Burke^^ about where the Fayette 

 should be, but that there was no distinct exposure on the railroad, along 

 which Kennedy made his section. Other detacbed exposures were found 

 east and west of the line, one of the priiuipal ones being at the town of 

 Homer. These sands and white clays overlie the Yegua and are very 

 like the Fayette, and while no fossils were found, we were re'asonably 

 certain that they did represent the true Fayette in this region and these 

 exposures were supposed to represent the outcropping edges of the main 

 body of sands. The clays in the valley of the Neches apparently over- 

 lying these sands were therefore thought to be Frio. 



Harris follows Veateh in referring the '^'T4rand Gulf l)eds jiroper" and 

 the Frio clays, as he terms Kennedy's Fleming beds, to the Oligocene."- 



Deussen embodies the result of his examination of this region in 

 his report, "Geology and Underground AYater-sup^jly of Southeastern 

 Texas." 3" 



From this report and the geologic map accompanying it, it would 

 appear that he limits the Jackson proper to a narrow lens of calcareous 

 fossiliferous clays containing large limestone concretions which extend 

 from the Sabine Eiver to Burke, on the Houston, East & AVest Texas 

 Railway. The surroimding sandier beds he calls the Catahoula, using 

 the name in a much broader sense than Veateh gave it, to include every- 

 thing (except the small belt of Jackson clays already referred to) be- 

 tween the Yegua clays and the Fleming clays from the Sabine Eiver to 

 the Colorado. This is modified, however, in a footnote^* stating that 

 later studies indicate that the Catahoula sandstone, described in his re- 

 port as a stratigraphic unit, really comprises two formations of similar 

 lithologic character, the one at the base being of Jackson age, whereas 

 the upper sandstone is of Oligocene age. The lower of these sandstones 

 includes the Wellborn sands of Kennedy. 



With regard to the age of the Wellborn beds. Deussen savs :^^ 



"Vaughan is of the opinion that the horizon represented by the hard fcs- 



31 Dumble : Science, vol. 16, 1902, p. 670. 



«2 Harris : Geol. Surv. Louisiana, 1902, p. 28. 



^ U. S. Geological Survey Water-supply Paper No. .S35. 



2* Op. cit., p. 70. 



35 Op. cit., p. 72. 



