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Publication Extents

Not all publications have extents, not all extents are completely accurate
Flood-plain delineation for Difficult Run Basin, Fairfax County, Virginia
P.L. Soule
1976, Open-File Report 76-459
Water-surface profiles of the 25-year and 100-year floods and maps on which the 25-, 50-, and 100-year flood boundaries are delineated for streams in the Difficult Run basin are presented in this report.The techniques used in the computation of the flood profiles and delineation of flood boundaries are presented, and...
Preliminary report on uranium-, thorium-, and rare-earth-bearing rocks near Golovin, Alaska
Thomas P. Miller, Raymond L. Elliott, Warren I. Finch, Robert A. Brooks
1976, Open-File Report 76-710
Uranium-, thorium-, and rare-earth bearing rocks were found by a U.S. Geological Survey field party 15 miles northeast of Golovin, Alaska, in  the southeastern Seward Peninsula (fig. 1) in June 1976. The mineralized areas occur in syenite and appear to be concentrated along the margins of alkaline dikes, with allanite...
Report on the environmental geology OCS area, eastern Gulf of Alaska
Bruce F. Molnia, Paul R. Carlson, Terry R. Bruns
1976, Open-File Report 76-206
In anticipation of oil and gas leasing of the outer continental shelf (OCS lease area 39) in the northeastern Gulf of Alaska, the U. S. Geological Survey began a regional reconnaissance in 1974. The study area, which extends from Prince William Sound on the west to Yakutat Bay on the...
A possible petroleum related helium anomaly in the soil gas, Boulder and Weld Counties, Colorado
Alan A. Roberts, M.C. Dalziel, L.A. Pogorski, S.G. Quirt
1976, Open-File Report 76-544
A survey of the concentrations of helium in the soil gas conducted over a portion of the Denver Basin in Boulder and Weld Counties, Colorado, supports the existence of a potential petroleum prospect that was suggested by earlier geochemical analyses of the outcropping sandstones. The helium survey technique may prove...
Lightweight aggregate production from claystone and shale in Bangladesh
Norbert A. Parker, M.A. Khan
1976, Open-File Report 76-163
Muffle furnace tests were made on samples of clay, claystone, and shale collected in the Chittagong and Dacca areas of East Pakistan to determine their amenability to bloating for the commercial production of light-weight aggregate. Several areas, sampled in some detail, were selected for investigation because of their proximity to...
Preliminary investigation of faults and folds along the inner edge of the coastal plain in northeastern Virginia
Robert B. Mixon, Wayne L. Newell
1976, Open-File Report 76-330
Four en-echelon northeast-trending structures, including southeast-dipping monoclines and northwest-dipping high-angle reverse-faults, have been mapped along the inner edge of the Coastal Plain in northeastern Virginia -- an area generally considered to be undeformed. Although displacements are small (15to 60 m), the structures markedly affect the present distribution and thickness of...
Guide to the availability of hydrologic data, Greater Pittsburgh region, Pennsylvania
Robert M. Beall
1976, Open-File Report 76-352
A great variety of hydrologic data are collected by many governmental agencies and other entities for diverse purposes. Some of the data are compiled and reported in readily available, widely known publications; some are not. Continuing requests for information on the locations of data collection sites and on the sources...
FORTRAN computer program for seismic risk analysis
Robin K. McGuire
1976, Open-File Report 76-67
A program for seismic risk analysis is described which combines generality of application, efficiency and accuracy of operation, and the advantage of small storage requirements. The theoretical basis for the program is first reviewed, and the computational algorithms used to apply this theory are described. The information required for running...
Coal resources of the Alton, Utah, EMRIA site
William E. Bowers, A.A. Aigen, Edwin R. Landis
1976, Open-File Report 76-386
The estimated original identified coal resources of the Alton, Utah, EMRIA (Energy Minerals Rehabilitation Inventory and Analysis) site--an area of about 3.6 square miles (9.3 square kilometres)--total almost 49 million tons (45 megatonnes). A larger area that surrounds and includes the Alton EMRIA site proper contains estimated original identified coal...
The hydrologic setting of lakes in Minnesota and adjacent states; with emphasis on the interaction of lakes and ground water
Thomas C. Winter
1976, Open-File Report 76-81
The hydrologic settings of 150 randomly-selected lakes in the north-central United States were investigated by principal component analysis as a first attempt to develop a general classification of the hydrologic setting of lakes. Precipitation-evaporation balance and the water quality parameters have high factor loadings on the first principal component. Highest...