448 KIRK BRYAN 



Faulting, except in connection with folding, throughout the 

 general region around Hot Springs, is dif&cult to establish. How 

 ever, in the coastal plain region of central and southern Arkansas 

 and adjacent states, Late Tertiary and post-Tertiary faulting have 

 probably taken place. According to Stephenson,^ small faults 

 are recognized in connection with the Preston anticline. In the 

 Monroe Gas Field- a post-Eocene fault with a total displacement 

 of 150 feet has been mapped. The theory of origin of salt domes 

 advanced by Harris^ rests on the postulate that faulting on an 

 extensive scale has taken place throughout eastern Texas, Louisiana, 

 and southern Arkansas. Quarternary faulting with a displace- 

 ment of at least 1,000 feet has been shown for the Jennings oil 

 field.'' A post-Tertiary fault with a throw of 2 feet to the south 

 was noted by Professor H. A. Wheeler^ and Colonel John R. 

 Fordyce 3 miles north of Stephens, Arkansas, a town 75 miles 

 south of Hot Springs. This fault appears to be very recent. 



The recorded evidence of recent faulting is thus incomplete, 

 but the known uplift of Pleistocene time must have offered favor- 

 able conditions for faulting however difficult the matter of proof 

 may be. While no recent faulting has been discovered at or near 

 Hot Springs, the foregoing facts indicate that such faulting is not 

 improbable and may yet be found. 



The hypothesis of juvenile origin thus also rests on an insecure 

 foundation since it postulates either a special igneous mass or a 

 special fault fissure. For neither of these is there other evidence. 



USE AND DEVELOPMENT OF THE HOT SPRINGS WATER 



The quantity of the Hot Springs water used for bathing and drink- 

 ing fluctuates from year to year but has gradually increased. The 



^L. W. Stephenson, "Contribution to the Geology of Northeastern Texas and 

 Southern Oklahoma," U.S. Geol. Survey, Contrib. to General Geol., Prof. Paper 120 

 (1919), pp. 129 ff. 



2 H. W. Bell and R. A. Cattell, Louisiana Dept. Conservation, Bull. No. 7, 192 1. 



3 G. D. Harris, Bull. Louisiana Geol. Survey No. 7 (1908), pp. 75 ff., also Econ. 

 Geology, Vol. IV (1909), pp. 12-34, and U.S. Geol. Survey Bull. 429 (1910), pp. 6-10, 

 PI. I. 



4 G. D. Harris, "Oil and Gas in Louisiana," U.S. Geol. Survey Bull. 429 (1910), 

 pp. 56-61. 



s Letter, October 22, 192 1. 



