REVIEW OF PREVIOUS WORK 457 



silifei-ous sandstone on the Robert Stephenson league is probably very low in 

 the Jackson ; and, if this be so, the beds between Wellborn and Millican would 

 represent in part the time equivalents of the Jackson formation along the 

 Sabine." 



His use of the Catahoula makes it cover the locality 4 miles north of 

 Corrigan, at which Veatch found his Jackson fossils. 



Tlie inference is, therefore, that he considers all of the beds from the 

 lojD of the Yegua to the base of his up2:)er or Oligocene sandstone as 

 referable to the Jackson. 



The report describing the Fleming clays refers them to the Miocene. 

 In connection with this, Matson gives Ball's determination of the Burke- 

 ville fossils and his reference of them to the Pliocene. 



Deussen, untler the name Dewitt, includes the Oakville, Lapara, and 

 Lagarto of Dumble, and shows them overlying the Fleming clay. A 

 footnote suggests that on the Sabine the Dewitt is represented by the 

 Fleming clay. 



Recent Examinations 



In connection with the investigation of the oil fields of the coast region, 

 wliicli has been carried on under the direction of the writer, there has 

 iieen occasion to study these sands at various places, and some of the 

 information oljtained and heretofore unpublished has a direct bearing on 

 this subject. 



During 1904 Hager endeavored to trace the lower contact of the Oak- 

 ville beds from the Nueces to the Sabine, his identifications of it Ijeing 

 based largely on the lithology of tlie l)eds. 



On the San Antonio Eiver he found the contact about 3 miles south 

 of Helena; on the Guadalupe near the mouth of Barton Creek, 10 miles 

 southeast of Gonzales; near Flatonia on the Galveston, Harrisburg & San 

 Antonio Railway; 3 miles north of La Grange; on the Brazos 5 miles 

 west of Xavasota; at Riverside on the Trinity; three-quarters of a mile 

 south of Corrigan; 1 mile south of Rockland, and on the Sabiiie about 

 1 mile north of Bun-^s Ferry, northeast of Burkeville. 



West of the Guadalu])e lie notes the presence of the Frio immediatelv 

 underlying the Oakville, but thinning toward the northeast. He incii- 

 tions its absence on tlio Colorado and eastward of that stream, all of tlie 

 contacts observed l)ciiig described as with the Fayette or Eocene sands. 



He thus descrilics iho Oakville beds cast of the Brazos: 



"On the Brazos the Oakville beds may best be described as cemented sands. 

 They consist of fine white sands, with some clay, firmly cemented into a white 

 mass by calcareous mateiial. They contain some gravel, silicified wood, and 



