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.

From Introduction: "The Leadville Quadrangle, Colorado (Fig. 1), was evaluated to identify and delineate areas and geologic units that exhibit characteristics favorable for the occurrence of uranium deposits. Geologic environments were placed into one of three categories--favorable, unfavorable, or unevaluated--based on National Uranium Resource Evaluation (NURE) program."

Appendices containing supplementary analytical data of uranium occurrences, chemical analyses of stream-sediment, rock, and soil samples, and tabulated radiometric and gamma-ray anomaly data to accompany a report on U.S uranium resources in the Leadville Quadrangle, Colorado.

Purpose and scope: The Eau Claire Quadrangle, Wisconsin and Minnesota, was evaluated to identify geologic units and delineate areas that exhibit characteristics favorable for the occurrence of uranium deposits. All geologic environments to a depth of 1500 m (5,000 ft) were evaluated by means of surface investigations and available subsurface data. Each environment was categorized as favorable, unfavorable, or unevaluated for uranium deposits based on recognition criteria contained in the study of significant uranium districts worldwide (Mickle and Mathews, eds., 1978). Evaluation of the Eau Claire Quadrangle was conducted by Golder Associates, Inc., under subcontract to Bendix Field Engineering Corporation (BFEC), for the National Uranium Resource Evaluation (NURE) program, managed by the Grand Junction Office of the U.S. Department of Energy (DOE). The evaluation program began February 1, 1978, and ended February 1, 1980. Time spent by Golder personnel on literature search, field work, evaluation of data, and preparation of the final report totaled approximately 3.5 man-years.

Appendices containing data on uranium availability in the Eau Claire Quadrangle to accompany a report on U.S. uranium resources in Wisconsin and Minnesota.

From Purpose and Scope: "The Beeville Quadrangle, Texas, was evaluated to a depth of 1500 m (5,000 ft) to identify geologic environments and delineate areas that exhibit characteristics favorable for the occurrence of uranium deposits."

Appendices containing data on uranium availability in the Beeville Quadrangle to accompany a report of U.S. uranium resources in Texas.

From Introduction: "The Seguin Quadrangle, Texas, was evaluated to a depth of 1500 m (5,000 ft) to identify geologic units and delineate areas that exhibit characteristics favorable for the occurrence of uranium deposits. Each geologic environment was categorized as favorable, unfavorable, or unevaluated for uranium deposits, based on recognition criteria obtained from the study of significant uranium districts worldwide (Mickle and Matherws, eds.1978)."

Appendices containing data on uranium availability in the Seguin Quadrangle to accompany a report on U.S. uranium resources in Texas.

From Introduction: "The Ritzville Quadrangle, in north-central Washington between lat. 47ºN. and 48ºN. and long 118ºW and 120ºW. (Fig. 1), was evaluated to identify geologic environments and delineate areas that exhibit characteristics favorable for the occurrence of uranium deposits. Favorable environments, as determined by surface and subsurface investigations, are those that could contain uranium deposits of at least 100 tons U3O8 in rocks with an average grade not less than 100 ppm U3O8."

Appendices containing uranium occurrence tables and reports for the Ritzville Quadrangle in addition to a table of chemical analyses to accompany a report on U.S. uranium resources in Washington.

From Introduction: "The Lander Quadrangle, Wyoming (Fig. 1), was evaluated to identify geologic environments and delineate areas that exhibit characteristics favorable for the occurrence of uranium deposits. Favorable areas are those that are capable of containing uranium deposit of at least 100 tons of U3O8 in rocks with a minimum average ore grade of 0.01%."

Appendices containing supplementary data on uranium occurrences in the Lander Quadrangle in addition to a table of chemical analyses, a well list, and petrology reports to accompany a report on U.S. uranium resources in Wyoming.

From Introduction: "The Reno Quadrangle, Nevada and California (Fig. 1), was evaluated to a depth of 1500 m (5,000 ft) to identify geologic environments and delineate areas that exhibit characteristics favorable for uranium deposits. Favorable environments are those that could contain at least 100 tons U3O8 at an average grade of at least 0.01% U3O8."

Supplementary data containing uranium occurrence reports to accompany a report on U.S. uranium resources in the Reno Quadrangle, Nevada and California.

From Introduction: "The Elk City Quadrangle (1º by 2º), Idaho and Montana, was evaluated to identify and delineate geologic environments that exhibit characteristics favorable for the occurrence of uranium deposits."

Appendices containing supplementary data on uranium availability to accompany a report on U.S. uranium resources in the Elk City Quadrangle, Idaho and Montana.

Discussing uranium occurrences in the Williamsport Quadrangle

Discussing chemical analyses from the Williamsport Quadrangle

Discussing occurrences of uranium in the Williamsport Quadrangle

Discussing test wells from the Williamsport Quadrangle

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

Discussing sample locations and uranium analyses of Idaho Batholith and associated igneous rocks in the hamilton quadrangle