510 JOURNAL OF TH^ WASHINGTON ACADEMY OF SClENCEvS VOL. 11, NO. 21 



ABSTRACTS 



Authors of scientific papers are requested to see that abstracts, preferably prepared 

 and signed by themselves, are forwarded promptly to the editors. The abstracts should 

 conform in length and general style to those appearing in this issue. 



GEOLOGY. — Geology of the Cement oilfield, Caddo County, Oklahoma. Frank 

 Reeves. U. S. Geol. Surv. Bull. 726-B. Pp. 45 (41-85). 1921. 



It has long been believed that the region of tilted strata which borders 

 the Wichita Mountains should contain local anticlines favorable for the 

 accumulation of oil and gas. The pronounced anticline at Cement and 

 anticlinal folds at Lawton and to the south in Cotton Count}'- support this 

 belief. The production of oil at Cement proves not only that the structure 

 at that locality is of the type favorable for oil accumulation but that there 

 are adequate reservoir beds and a source of petroleum. 



The area lies about 15 miles northeast of the Wichita Mountains, in the 

 Permian "Red Beds" plain, which encircles the Wichita uplift and out of 

 which the mountains rise "hke islands in a sea." 



The surface rocks of the Cement field and about 1,500 feet of the under- 

 lying beds are regarded by the writer as of Permian age. They consist of 

 red and blue shales, red and gray sandstone, gypsum, and limestone. 



The geologic structure is described and its relation to the accumulation 

 of oil is discussed. 



The oil produced so far in this field has come from a series of shales and 

 sandstones, which underlies the surface at depths of 1,500 to 2,400 feet. 



The paper concludes with recommendations as to future development 

 and copies of drillers' logs of wells. R. W. Stone. 



GEOLOGY AND KYBROhOGY .—Ground water in the Norwalk, Suffield, 

 and Glastonbury areas, Connecticut. Harold S. Palmer. U. S. Geol. 

 Surv. Water-Supply Paper 470. Pp. 171, pis. 12, figs. 18. 1920. 



This paper is the third to appear of a series of detailed reports on the 

 ground water resources of selected areas in Connecticut. The first part 

 of the report is of a general character and treats of the water-bearing for- 

 mations, occurrence and recovery of ground water, and its quality. This 

 is followed by descriptions of the thirteen towns included in the three areas. 



Almost everywhere small quantities of water may be obtained from fis- 

 sures and joints in the bed rocks which include igneous and metamorphic 

 rocks of pre-Triassic age, and sandstone, shales, and traps of Triassic age. 

 In the upper levels the bed rock is overlain by till which in general yields 

 satisfactory domestic supplies. The deposits of stratified glacial outwash 

 in the lowlands yield abundant supplies of water. 



For each of the three areas there is given a geologic map showing the 

 distribution of the various water-bearing formations, and a map showing 

 the distribution of woodlands and the locations of the weUs and springs 

 referred to in the tables in the body of the report. H. S. P. 



UYBROLOGY .—Water supply of St. Mary and Milk Rivers, 1898-1917. 

 B. E. Jones and R. J. BurlEy. U. S. Geol. Surv. Water-Supply Paper 

 491. Pp. 583, pis. 26. 1920. 

 This report is a compilation of all stream-flow data collected in 1898-1917, 



