Discussing anomalies on gamma-ray logs from petroleum test wells from the Rapid City Test Wells

Discussing analytical data associated with tertiary intrusives of the northern black hills in the Rapid City Quadrangle

Discussing locations and analyses of samples from the Rapid City Quadrangle

Discussing occurrences of uranium in the Rapid City

Discussing test wells for the Rapid City Quadrangle

Discussing petrographic reports on samples in the Rapid City Quadrangle

Discussing uranium occurrences in the Rapid City Quadrangle

Discussing reported uranium occurrences not visited in the Rapid City Quadrangle

Discussing uranium anomalies in the Inyan Kara Group, in the Rapid City Quadrangle

Discussing mean equivalent values for the cTh, EU, and %K derived from ARR data and host/source designations by the variable-premise evaluation system in the Rapid City Quadrangle

Results of reconnaissance surveys of the Rapid City quadrangle to determine the likelihood of uranium deposits of the area, and additional information about the location and classification of any deposits.

Appendix containing statistical summary of geochemical data from stream sediment, ground and surface water samples in the Newcastle quadrangle to accompany a report on U.S. uranium resources in Wyoming in South Dakota.

Appendix containing uranium occurrence reports in the Newcastle quadrangle to accompany a report on U.S. uranium resources in Wyoming and South Dakota.

Appendix containing field data and chemical analyses of stream sediment samples collected from outcrop areas of the Newcastle quadrangle.

Appendix containing data on gamma ray anomalies in oil and gas test wells to accompany a report on U.S. uranium resources in Wyoming and South Dakota.

Appendix containing data on uranium occurrences in the Newcastle quadrangle to accompany a report on U.S. uranium resources in Wyoming and South Dakota.

Appendix containing tabulated rock sample analyses of the Newcastle quadrangle to accompany a report on U.S. uranium resources in Wyoming and South Dakota.

Appendix containing field data and chemical analyses of ground and surface water samples of the Newcastle quadrangle to accompany a report of U.S. uranium resources in Wyoming and South Dakota.

Uranium resources of the Newcastle 1°x2° Quadrangle, Wyoming and South Dakota were evaluated to a depth of 1,500 m (5000 ft) using available surface and subsurface geologic information. Many of the uranium occurrences reported in the literature and in reports of the U.S. Atomic Energy Commission were located, sampled and described. Areas of anomalous radioactivity, interpreted from an aerial radiometric survey, were outlined. Areas favorable for uranium deposits in the subsurface were evaluated using gamma-ray logs. Based on surface and subsurface data, two areas have been delineated which are underlain by rocks deemed favorable as hosts for uranium deposits. One of these is underlain by rocks that contain fluvial arkosic facies in the Wasatch and Fort Union Formations of Tertiary age; the other is underlain by rocks containing fluvial quartzose sandstone facies of the Inyan Kara Group of Early Cretaceous age. Unfavorable environments characterize all rock units of Tertiary age above the Wasatch Formation, all rock units of Cretaceous age above the Inyan Kara Group, and most rock units of Mesozoic and Paleozoic age below the Inyan Kara Group. Unfavorable environments characterize all rock units of Cretaceous age above the Inyan Kara Group, and all rock units of Mesozoic and …

Uranium resources of the Newcastle 1°x2° Quadrangle, Wyoming and South Dakota were evaluated to a depth of 1,500 m (5000 ft) using available surface and subsurface geologic information. Many of the uranium occurrences reported in the literature and in reports of the U.S. Atomic Energy Commission were located, sampled and described. Areas of anomalous radioactivity, interpreted from an aerial radiometric survey, were outlined. Areas favorable for uranium deposits in the subsurface were evaluated using gamma-ray logs. Based on surface and subsurface data, two areas have been delineated which are underlain by rocks deemed favorable as hosts for uranium deposits. One of these is underlain by rocks that contain fluvial arkosic facies in the Wasatch and Fort Union Formations of Tertiary age; the other is underlain by rocks containing fluvial quartzose sandstone facies of the Inyan Kara Group of Early Cretaceous age. Unfavorable environments characterize all rock units of Tertiary age above the Wasatch Formation, all rock units of Cretaceous age above the Inyan Kara Group, and most rock units of Mesozoic and Paleozoic age below the Inyan Kara Group. Unfavorable environments characterize all rock units of Cretaceous age above the Inyan Kara Group, and all rock units of Mesozoic and …

This report follows the evaluation of uranium resources in the Ekalaka 1°x 2° Quadrangle, Montana and North and South Dakota to a depth of 1,500 m (5,000 ft) using available subsurface geologic information.

The following plates depict the geology of the Ekala quadrangle in Montana, North and South Dakota.

Appendices containing data on uranium occurrences in the Hot Springs Quadrangle to accompany a report on uranium availability in South Dakota and Nebraska.

Appendices containing data on uranium resources in the Gillette Quadrangle to accompany a report on U.S. uranium resources in Wyoming, South Dakota, and Montana.