370 C. II. Gordon — Chalk formations of Northeast Texas. 



Kiver, and Saline Landing on the West Saline River. In the 

 Arkansas region, it is known as the White Cliffs formation." 



In a recent paper* Veatch follows Hill in assigning the 

 Annona chalk to a higher horizon than the Austin. The 

 statement is madef that the Austin is not found east of Paris, 

 Texas. In his table of correlations, the upper part of the 

 Bingen sand is regarded as the equivalent of the Austin chalk. 

 He says : " The Bingen, which is the lithological counterpart 

 of the Woodbine, apparently contains littoral equivalents of 

 the Austin and Eagle Ford." 



The formations underlying northeast Texas consist chiefly of 

 Upper Cretaceous and lower Tertiary rocks. The Woodbine 

 sands, which constitute the base of the Upper Cretaceous, 

 appear along the south side of Bed Biver, in the northern part 

 of Lamar county. The strata have a general dip of about 50 

 to 60 feet per mile toward the south by southeast. As a result 

 of this, in passing from north to south, higher formations 

 appear in successive belts except where interrupted by cover- 

 ings of more recent deposits. The classification of the Upper 

 Cretaceous of northeast Texas as adopted in a forthcoming 

 report on the underground waters of the region is as follows : 



Navarro and Taylor. 



6. Dark laminated clays and blue sandy shales ; limited expo- 

 sures in the north part of Hopkins county. 



5. Glauconitic sands in the south part of Delta county. 



4. Sandy marls and clays with lime concretions filled with 

 fossils. Underlies most of Delta county. 



3. Impure sandy chalk forty to fifty feet thick grading into marls 

 above and the sandy beds below. Exposed in the north part of 

 Delta county near Enloe and extends in a narrow belt southwest- 

 ward somewhat to the south of Ladonia and between Fairlie 

 and Wolf City in Hunt county. 



2. Fine yellow glauconitic sand with thin lenses of fossilifer- 

 ous limestone. Grades upward into the chalk and downward 

 into clay. Thickness about 40 to 60 feet. 



1. Blue clay marls forming a deep black soil similar to that of 

 the marls above. One hundred to one hundred and fifty feet. 



Austin Formation. 



Annona Chalk. — Bluish and creamy-white chalk. Thickness 



fifty to one hundred feet. 

 Brownstown Marls. — Blue marly clay, slightly glauconitic. Four 



hundred to five hundred feet thick. 



* Professional Paper, No. 46, U. S. Geological Survey, 1906, 

 f Ibid, p. 19. See also p. 24. 



