Technical Report Archive and Image Library (TRAIL) - 6 Matching Results

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Pre-Cambrian Rocks of the Lake Superior Region: A Review of Newly Discovered Geologic Features, with a Revised Geologic Map

Description: From abstract: Detailed knowledge of the geology of the pre-Cambrian rocks of the Lake Superior region has been greatly augmented since the publication of Monograph 52 by the United States Geological Survey in 1911. The authors have attempted in the present report to assemble as much of this new information as possible, and to give the reader a birdseye view of the geology as seen in the light of all studies made there up to the present time. Detailed descriptions are not presented, and the emphasis is placed upon the major problems of correlation. A revised map of the region, with cross sections, accompanies the report, bringing up to date a knowledge of the areal geology of the region, which otherwise could be gained only by consulting some 150 maps contained in almost as many separate local reports, many of which are unpublished.
Date: 1935
Creator: Leith, C. K.; Lund, Richard Jacob & Leith, Andrew
Partner: UNT Libraries Government Documents Department

Estimating Generalized Flood Skew Coefficients for Michigan

Description: From purpose and scope: The purpose of this report is to compare and evaluate four methods of estimating flood-frequency skew coefficients for Michigan. These methods are based on use of (1) the generalized skew map of the United States, (2) maps showing lines of equal mean skew of Michigan, (3) mean regional station skews, and (4) skew-prediction equations.
Date: 1983
Creator: Croskey, Hope M. & Holtschlag, D. J.
Partner: UNT Libraries Government Documents Department

Ground-Water Contamination at Wurtsmith Air Force Base, Michigan

Description: From introduction: The U.S. Geological Survey, at the request of the U.S. Air Force, began an investigation of geologic and hydrologic conditions at Wurtsmith Air Force Base in September 1979. The investigation was prompted by the discovery that an underground storage tank containing trichloroethylene (TCE) had leaked, contaminating Base water-supply wells. Subsequent information suggested that the trichloroethylene had moved off-Base.
Date: 1983
Creator: Stark, J. R.; Cummings, T. R. & Twenter, F. R.
Partner: UNT Libraries Government Documents Department

Geology and Monazite Content of the Goodrich Quartzite, Palmer Area, Marquette County, Michigan

Description: From abstract: The Palmer area, which is on the south limb of the Marquette synclinorium, consists of a down-faulted block of pre-Cambrian sedimentary rocks about 4 miles long and three-quarters of a mile wide. The block is composed mainly of middle Huronian Ajibik quartzite and Negaunee iron-formation and upper Huronian Goodrich quartzite,. Monazite occurs in the Goodrich quartzite as rounded detrital grains concentrated mainly in the matrix of quartz pebble conglomerate which is interbedded with coarse-grained quartzite.
Date: December 1954
Creator: Vickers, Rollin C.
Partner: UNT Libraries Government Documents Department

Greens Creek Uranium Occurrence, Marquette County, Michigan

Description: From abstract: Metatorbernite and bassetite are present in altered carbonaceous and quartzose slate of probable upper Huronian age. The slate is part of a small inlier of Huronian rocks between the Gwinn iron district to the southeast and the Marquette iron district to the northwest, Marquette County, Mich. Samples taken from a shallow trench, which was dug in the area of highest radioactivity, contained as much as 0.68 percent uranium. A 4-foot channel sample of the slate contained 0.036 percent uranium.
Date: June 1955
Creator: Vickers, R. C.
Partner: UNT Libraries Government Documents Department