408 B. T. Hill — Deej) Artesian Boring in Texas. 



Blue and yellow clay, and gray sand 2773 



Very soft blue clay and reddish clay 2733 to 2871 



Coarse sand ..2871 to 2863 



The drill was in soft clay and fine sand at 2863 



No paleontologic data having been given I can only inter- 

 pret these through rny knowledge of the outcrop of the strata 

 on the adjacent coastal plain bordering the Gulf east of Austin 

 and San Antonio. It is said that Mr. Singley, a local observer, 

 lias carefully collected the paleontologic data, which it is hoped, 

 be will publish. 



In studying the section one is impressed by the littoral 

 character of its material and the absence of indurated or con- 

 solidated rock, and the chalky marls and limestones charac- 

 teristic of the Upper Cretaceous formation, leaving the 

 impression that the 2863 feet of sediments are almost if not 

 entirely composed of post Cretaceous beds. 



Every foot of the deposits passed through in the well can 

 be seen in the adjacent outcrops of Texas to-day. These 

 belong to three formations. The provisional interpretations I 

 would place upon the well are as follows : 



No. Strata in well. Formation. Age. 



1 0-827 Coast Prairie Beds. Pleistocene. 



2 827-1754 Fayette Sands of Pliocene Miocene. 



Penrose. 



3 1754-2653 Lignitic Eocene. Eocene. 



4 



5 2653-2863 Probably Eocene but may be Upper Cretaceous. 



These formations have been described by Penrose, McG-ee 

 and the writer. No. 1, the Coast Prairie beds are supposed 

 by McGee to represent the southern stage of the former 

 Columbian formation, and were laid down at marine base-level 

 continuing around the coast into Louisiana, ]STo. '6, is the well 

 known Eo-Lignitic formation of the southern United States, 

 as described originally by Hilgard as the Great Northern Lig- 

 nite.* Penrosef has shown the general character of the 

 formation in Texas and the writer;}: in Arkansas. It is un- 

 doubtedly the direct geographic continuation in part of the 

 Laramie beds of the Rocky Mountain region, as shown by Dr. 

 C. A. White§ and the writer. || JSTo. 2 — the Fayette Sands — 

 is a more problematical formation. Its general occurrence has 



* Agriculture and Geology of Mississippi, Jackson, 1860. 



f Preliminary Report on the Geology of the Gulf Tertiary of Texas, from Red 

 River to the Rio Grande. Austin. 



X The Neozoic Geology of Southwestern Arkansas, Little Rock, 1887. 



§ This Journal. 



|| Notes on the Texas New Mexican Region, Bull. Geol. Soc, vol. hi, 1891. 



