Publications

In any effort to establish nomenclature relating to the flow of fluids through porous media it would seem well first to consider the history of the development of our concepts and of the terms or expressions involved. Only in this way can precedent rightfully be honored and at the same time duplicating expressions be eliminated and the remaining more useful terms clarified. Then, proceeding with a

Alexander, W. H., Jr., Broadhurst, W. L., and White, W. N., Progress report on ground water In the High Plains in Texas, Tex. State Bd. Water Engrs., 12 pp., 7 tigs. (mimeogranhedl May 1944.Ashley, George H.,and Graham, Jack B., Groundwater investigations in Pennsylvania Pa. Dep. Internal Affairs, Monthly Bull., v. 13, pp. 10–13 and 28, 1945.

Because of war‐imposed responsibilities of most agencies and individuals this year, no new programs were undertaken by the Committee, but the work of the Subcommittee on Permeability was continued, and a substantial progress report by C. E. Jacob, Acting Chairman, and by members of this Subcommittee follows this report as Appendices A to D.Following a suggestion by Max Suter, copies of this year's

Explorers began to push into the vast uncharted areas of the West in 1804, when Captains Lewis and Clarke ascended the Missouri River, crossed the Rocky Mountains into the headwaters of the Columbia River, and followed that stream to the Pacific Ocean. The honor of being the first white man to see Great Salt Lake is claimed for a number of explorers and trappers who visited the region in the twent

Matthew I. Rorabaugh (U.S. Geological Survey, Louisville, Kentucky, August 27, 1945)—In regions where snow is not a factor there is some advantage in making forecasts based on the effects of travel time and base flow. However, the runoff which results from precipitation during the period of forecast usually constitutes a substantial portion of the flow in many streams, and accordingly these predic

The membership of the committee has been selected to afford good representation of geographic sections and of organizations engaged in runoff research. Some new members were added during the year in order to strengthen the representation of the committee in certain phases of runoff research. Norbert H. Leupold submitted his resignation in April because his work is no longer directly related to run

The variety of usage and even the confusion in the nomenclature and terminology of some fields of hydrology have been often remarked. The Committee on Runoff conceived the idea that it would be profitable to consider some of the terms which are especially pertinent to the field of runoff. That consideration was the principal Committee project of the past year and is featured in this report.The Cha

The capacities of a water‐bearing formation to transmit water under a hydraulic gradient and to yield water from storage when the water table or artesian pressure declines, are generally expressed, respectively, in terms of a coefficient of transmissibility and a coefficient of storage. Determinations of these two constants are almost always involved in quantitative studies of ground‐water problem

During 1945 and 1946, the Research Committee of the American Association of Petroleum Geologists, under the chairmanship of Shepard W. Lowman, has been engaged in “a reconnaissance survey of research in petroleum geology and allied sciences with explicit reference to exploration” in order “to formulate a comprehensive research program which the American Association of Petroleum Geologists may adop

The zinc deposits of the Jefferson City area are confined to the lower half of the Kingsport formation of the Knox group of rocks. They are on the southeast flank of a northeast-trending anticline which is partially overridden from the southeast by the Bays Mt. thrust sheet. The beds show low dips. The area is transected by a series of high angle strike-slip faults having relatively small displace

In the West, where volcanic materials are abundantly distributed among the rocks of the geologic column, the importance of sedimentary processes in the formation of high-alumina clays has not been fully appreciated. At Ione, Calif., Castle Rock, Wash., Whiteware, Mont., Hobart Butte and Mollala, Oreg., where the Geological Survey has been investigating clays jointly with the Bureau of Mines, U. S.

The Dunmore lode is localized along a persistent fissure zone over two miles long and averaging nearly 100 feet in width along the length of the Dunmore claim. The fault in which the lode is located offset the pre-Cambrian quartzite and slate walls about 4,500 feet prior to deposition of the overlying thick San Juan tuff. Late Tertiary faulting extended the fissure into the San Juan tuff, dropping