Publications
Publications from the staff of the Geology, Minerals, Energy, and Geophysics Science Center
Filter Total Items: 2386
Geologic constraints on the upper limits of reserve growth
For many oil and gas fields, estimates of ultimate recovery (the sum of cumulative production plus estimated reserves) tend to increase from one year to the next, and the gain is called reserve growth. Forecasts of reserve growth by the U.S. Geological Survey rely on statistical analyses of historical records of oil and gas production and estimated reserves. The preproposal in this Open-File Repor
Authors
Richard G. Stanley
Preliminary compilation of data for selected oil test wells in Northern California
Oil test wells can provide information on the depth, age, inclination, porosity, permeability, density, faulting, folding, and organic content of geologic formations mapped at the surface, or on units not recognized in surface outcrops. Formation density, as expressed in sonic and density logs commonly obtained when wells are drilled, has become increasingly important in making a crustal-scale 3-D
Authors
Earl E. Brabb, Charles L. Powell, Thomas M. Brocher
Geologic map and database of the Roseburg 30' x 60' quadrangle, Douglas and Coos Counties, Oregon
The Roseburg 30' x 60' Quadrangle covers the southeastern margin of the Oregon Coast Range and its tectonic boundary with Mesozoic terranes of the Klamath Mountains (see figures 1 and 2 in pamphlet, also shown on map sheet). The geologic framework of the Roseburg area was established by the pioneering work of Diller (1898), Wells and Peck, (1961) and Ewart Baldwin (1974) and his students (see figu
Authors
Ray E. Wells, A. S. Jayko, A. R. Niem, G. Black, T. Wiley, E. Baldwin, K. M. Molenaar, K. L. Wheeler, C. B. DuRoss, R. W. Givler
Late Quaternary eolian records of the Americas and their paleoclimatic significance
No abstract available.
Authors
Daniel R. Muhs, Marcelo Zarate
The variability of root cohesion as an influence on shallow landslide susceptibility in the Oregon Coast Range
Decades of quantitative measurement indicate that roots can mechanically reinforce shallow soils in forested landscapes. Forests, however, have variations in vegetation species and age which can dominate the local stability of landslide-initiation sites. To assess the influence of this variability on root cohesion we examined scarps of landslides triggered during large storms in February and Novem
Authors
K. M. Schmidt, J. J. Roering, J. D. Stock, W. E. Dietrich, D. R. Montgomery, T. Schaub
Calculating depths to shallow magnetic sources using aeromagnetic data from the Tucson Basin
Using gridded high-resolution aeromagnetic data, the performance of several automated 3-D depth-to-source methods was evaluated over shallow control sources based on how close their depth estimates came to the actual depths to the tops of the sources. For all three control sources, only the simple analytic signal method, the local wavenumber method applied to the vertical integral of the magnetic
Authors
Daniel W. Casto
Geologic map of the Lake Mathews 7.5' quadrangle, Riverside County, California
Open-File Report 01-479 contains a digital geologic map database of the Lake Mathews 7.5’ quadrangle, Riverside County, California that includes:
ARC/INFO (Environmental Systems Research Institute, http://www.esri.com) version 7.2.1 coverages of the various elements of the geologic map.
A PostScript file to plot the geologic map on a topographic base, containing a Correlation of Map Units diagram
Authors
Douglas M. Morton, F. Harold Weber
Geologic map of the Riverside East 7.5' quadrangle, Riverside County, California
Open-File Report 01-452 contains a digital geologic map database of the Riverside East 7.5’ quadrangle, Riverside County, California that includes:
ARC/INFO Environmental Systems Research Institute (http://www.esri.com) version 7.2.1 coverages of the various elements of the geologic map.
A Postscript file to plot the geologic map on a topographic base, containing a Correlation of Map Units diagra
Authors
Douglas M. Morton, Brett F. Cox
Geologic map of the Riverside West 7.5' quadrangle, Riverside County, California
Open-File Report 01-451 contains a digital geologic map database of the Riverside West 7.5’ quadrangle, Riverside County, California that includes:
ARC/INFO (Environmental Systems Research Institute, http://www.esri.com) version 7.2.1 coverages of the various elements of the geologic map.
A PostScript file to plot the geologic map on a topographic base, containing a Correlation of Map Units diagr
Authors
Douglas M. Morton, Brett F. Cox
Geologic map of the Sunnymead 7.5' quadrangle, Riverside County, California
Open-File Report 01-450 contains a digital geologic map database of the Sunnymead 7.5’ quadrangle, Riverside County, California that includes:
ARC/INFO (Environmental Systems Research Institute, http:/www.esri.com) version 7.2.1 coverages of the various elements of the geologic map.
A Postscript file to plot the geologic map on a topographic base, containing a Correlation of Map Units diagram (CM
Authors
Douglas M. Morton, Jonathan C. Matti