A7^ea in Louisiana and Eastern Texas. 79 



in this direction is not known, but L. W. Stephens on^^ 

 has expressed the opinion that the Preston anticline is 

 probably directly related to it and that the folding of the 

 Cretaceous strata in the anticline was merely incidental 

 to the upbowing of the underlying basement rocks. 



The Sabine uplift/^^ also called the Sabine peninsula,^^ 

 lies in northwestern Louisiana and northeastern Texas. 

 It is in line with the general southeastward trend of the 

 Preston anticline and is not far south of a straight line 

 projected S. 60° E. from the Arbuckle uplift, whose 

 general trend is in this direction. Although the Sabine 

 uplift and Preston anticline are structural features 

 involving Tertiary, Cretaceous, and probably Paleozoic or 

 older rocks and are thus of Cretaceous or later age, they 

 perhaps occupy the site of one or more pre-Cretaceous 

 anticlines and represent merely an accentuation of the 

 earlier anticlines. 



The view that there is a relation between the structure 

 of the Cretaceous and Tertiary sediments of the Gulf 

 Coastal Plain and the structure of the underlying Paleo- 

 zoic or older rocks has been expressed by other geologists, 

 especially those who have studied the problems presented 

 by the salt domes of the coastal plain. The generally 

 accepted opinion regarding these domes are that they lie 

 along lines of fracture in the Paleozoic or older rocks. 

 These lines of fracture, as well as the Sabine uplift and 

 other folds here mentioned, may have been first produced 

 in the Paleozoic or pre-Paleozoic rocks prior to the Creta- 

 ceous period and further movement may have taken place 

 during Cretaceous or later time.^^ 



^ Stephenson, L. W., op. cit., p. 160. 



^ Harris, G. D., Oil and gas in northwestern Louisiana with special refer- 

 ence to the Caddo field, Louisiana Geol. Survey, Eept. for 1909, Bull. 8, 

 Plate 1 and pp. 5-8, 1908. Oil and gas in Louisiana with a brief summary 

 of their occurrence in adjacent States, U. S. Geol. Survey, Bull. 429, Plate 

 1, figure 1 and p. 9, 1910. 



Matson, G. C, and Hopkins, O. B., The DeSoto-Eed Eiver oil and gas 

 field, Louisiana, U. S. Geol. Survey, Bull. 661, pp. 117-118, and Plate 7, 

 1918. 



Powers, Sidney, The Sabine uplift, Louisiana: Amer. Assoc. Petroleum 

 Geologists, BuU., vol. 4, no. 2, pp. 117-136, 1920. 



^ Harris, G. D., Eock salt — ^its origin, geological occurrences and economic 

 importance in the State of Louisiana, Louisiana Geol. Survey, Eept. for 

 1907, Bull. 7, Plate 24, and pp. 79-80, 1908. 



** Since the transmittal of the present paper for publication a paper by 

 Powers (Amer. Assoc. Petroleum Geologists, Bull., vol. 4, no. 2, pp. 117-136, 

 1920) has been published in which he expresses a similar view regarding the 

 Sabine uplift. 



