Report presenting new data on the age of the Boulder, Philipsburg, and Idaho batholiths of western Montana.

Report discussing the regional geology, geomorphology, structure, mineral deposits, and details of the sedimentary and igneous rocks of the Placerville Quadrangle in Colorado.

A report regarding the areal geology of the Placerville Quadrangle, located in colorado. This report concerns work done on behalf of the division of Raw Materials of the U.S. Atomic Energy Commission.

Abstract: Experiments using highly turbid water from playa lakes for injection into the Ogallala Formation have resulted in greatly decreased yield of the recharge wells. Recharge of ground or surface water of good quality has indicated, however, that injection through wells in an effective method of recharging the aquifer. Water that is slightly turbid can be successfully injected for a period of time, but generally results in constantly declining yields and capacity for recharge. Redevelopment through pumping and surging significantly prolongs the life of recharge wells under some conditions. Surface spreading is little practiced on the High Plains, but locally may be a feasible means of artificial recharge.

Report discussing the coarsely crystalline autunite in granitic rock near Mt. Spokane, Washington. "This report is an abstract of a paper with the same title that is planned for publication in the American Mineralogist."

Abstract: Flow in the unconsolidated glacial deposits near the city of Carmel in central Indiana was simulated by a digital-computer model in a study of hydraulic characteristics of the deposits. The study shows that 21 • 3 million gallons per day (933 liters per second) of additional water could be withdrawn from the aquifer for an indefinite period of time. This pumpage is approximately 5 million gallons per day (219 liters per second) above the projected water needs of Carmel for 1990. Saturated thickness, transmissivity, and storage coefficient of the outwash aquifer along the White River east of Carmel were determined, using available data supplemented by test drilling . The saturated thickness of the aquifer ranges from 10 to 110 feet 0 to 34 meters ); transmissivity ranges from 1,000 feet squared per day (93 meters squared per day) to 24 ,000 feet squared per day (2 ,230 meters squared per day); and the average storage coefficient is 0.11.

A report about uranium in Colorado which oxidize to yield U(VI) before reacting significantly with other mineral constituents.

A report about uranium occurring as minerals of the Colorado Plateau ores.

Report discussing the possible existence of pegmatites containing beryllium deposits in the granite stock in the vicinity of Mount Antero and White Mountain, Chaffee County, Colorado.

Introduction: The chemical character of ground water depends to a large degree upon the character of the rock formations through which the water moves. The composition of the water is the result of several solutional and decompositional processes.

From Abstract: "A study of the critical factors in the colorimetric determination of total iron in silicate and phosphate rocks, and in other nonmetallic materials is presented. It was desired to ascertain the wavelength of maximum absorbancy, the optimum concentration range for iron, the effect of different substances on the ferrous-o-phenanthroline system, and reproducibility of results."

From abstract: "The isotopic abundances of uranium and the radium activity ratios of 11 samples of uranium ore from the Colorado Plateau have been measured." Experimental data and discussion is included with information regarding the samples used.

This report compares the techniques used to measure re-aeration coefficients for Black Earth Creek and the Madison Effluent Channel near Madison, Wisconsin using radioactive and modified tracers. It contains maps, graphs, and photographs.

This report describes the results of a computer model simulation of the Potomac-Raritan-Magothy aquifer system in New Jersey to see "the effects of supplementing ground water from the Delaware River. It includes tables.

From purpose and scope: The purpose of the present study by the U.S. Geological Survey in cooperation with the Division of Water Resources of the New Jersey of Environmental Protection is to make a quantitative hydrologic analysis of the known buried valley-fill aquifer in southwestern Essex and southeastern Morris County Counties in order to provide water-resources planners with the hydrologic bases to plan ground-water development and to allocate available water.

The following report covers investigations on sedimentary rocks of Middle Pennsylvanian age in northeastern Oklahoma, southeastern Kansas, and western Missouri. Distribution of uranium and other trace elements in these rocks was studied during 1955 and 1956.

This report summarizes all the information available to the authors on the aluminum phosphate zone on the properties owned by International Minerals and Chemical Corporation.

Abstract: Ground water continues to discharge into the Navidad and Lavaca Rivers by seepage out-flow even though large amounts of ground water are pumped for irrigation. Although a reduction in streamflow probably has occurred, a complete loss of the low flow of the streams by infiltration to a lowered water table seems remote. The large ground-water withdrawals will continue to cause land-surface subsidence, which will range from 0.012 foot to more than 0.026 foot per year. A minimum of about 0.013 to 0.015 foot of annual subsidence at the upper ends of the proposed reservoir and a maximum of about 0.019 foot near the dam site can be expected. Structural failures of manmade features have not occurred from the subsidence, but regional changes in the land slope have occurred and will continue . Numerous fault traces have been mapped in the area, but most of the faults are inactive. If movement along the fault planes should occur, the vertical displacement probably will not exceed the total subsidence.

From abstract: The purpose of this preliminary electrical resistivity investigation of Holiday Mesa, Monument Valley region, San Juan County, Utah, was to determine the feasibility of a detailed survey to delineate channels cut into the Moenkopi formation and filled with sediments of Shinarump conglomerate. These structures are in many places related to the localization of uranium ore.

From abstract: "The transport of matter by fluids percolating through a porous medium is described by setting up a mass conservation equation, analogous to that of hydrodynamics, for each of the substances in question... The results are applied to some selected data from the Texas Panhandle gas field."

Abstract: Extensive water withdrawal from Floridian aquifer in the urban Tampa Bay area has induced leakage from the overlying surficial aquifer adversely effecting the water table and lake levels. Artificial recharge could reduce the impact of these adverse effects. Four experiments were conducted to investigate possible recharge alternatives; sinkhole recharge, water-spreading, connector wells, and subsurface-tile drainage to a deep well. Experiments indicate that all four methods can be effective. However, the sinkhole recharge experiment moved the greatest potential for draining the surficial aquifer. Combinations of the four methods could be used where potential exists for downward movement of water and sufficient unsaturated aquifer for water storage.

Report summarizing the results of geological exploration of the Atkinson Mesa area of Montrose County, Colorado and contains a brief description of the area's geology and ore deposits.

A report about how the U. S. Geological Survey explored the Atkinson Mesa area for uranium and vanadium bearing deposits from July 2, 1951, to June 18, 1953, with 397 diamond drill holes that totaled 261,251 feet.

A report regarding exploration for uranium deposits in the Atkinson Mesa area, Montrose County, Colorado. Concerns work done on behalf of the division of Raw Materials of the U.S. Atomic Energy Commission.