Publications
Publications from the staff of the Geology, Minerals, Energy, and Geophysics Science Center
Filter Total Items: 2354
Intrusive rock database for the Digital Geologic Map of Utah
Digital geologic maps offer the promise of rapid and powerful answers to geologic questions using Geographic Information System software (GIS). Using modern GIS and database methods, a specialized derivative map can be easily prepared. An important limitation can be shortcomings in the information provided in the database associated with the digital map, a database which is often based on the lege
Authors
C.J. Nutt, Steve Ludington
Platinum-group element mineralization in the Stillwater Complex, Montana
No abstract available.
Authors
Michael L. Zientek, Roger W. Cooper, Sam R. Corson, E. P. Geraghty
What governments are doing to reduce the consequences of landslides
No abstract available.
Authors
E. E. Brabb, D. G. Howell, W. R. Cotton
Origin of the Lisburne Hills–Herald Arch structural belt: Stratigraphic, structural, and fission-track evidence from the Cape Lisburne area, northwestern Alaska
No abstract available.
Authors
Thomas E. Moore, T.A. Dumitru, K.E. Adams, S.N. Witebsky, A. G. Harris
Isostatic gravity map of the Monterey 30' x 60' quadrangle and adjacent areas, California
The digital dataset consists of one file (monterey_100k.iso) containing 2,385 gravity stations. The file, monterey_100k.iso, contains the principal facts of the gravity stations, with one point coded per line. The format of the data is described below.
Each gravity station has a station name, location (latitude and longitude, NAD27 projection), elevation, and an observed gravity reading. The data
Authors
V. E. Langenheim, S. R. Stiles, R.C. Jachens
Rationale and operational plan to upgrade the U.S. gravity database
A concerted effort is underway to prepare a substantially upgraded digital gravity anomaly database for the United States and to make this data set and associated usage tools available on the internet. This joint effort, spearheaded by the geophysics groups at the National Imagery and Mapping Agency (NIMA), University of Texas at El Paso (UTEP), U.S. Geological Survey (USGS), and National Oceanic
Authors
Thomas G. Hildenbrand, Allen Briesacher, Guy Flanagan, William J. Hinze, A. M. Hittelman, Gordon R. Keller, R. P. Kucks, Donald Plouff, Walter Roest, John Seeley, David A. Stith, Mike Webring
Preliminary report on mercury geochemistry of placer gold dredge tailings, sediments, bedrock, and waters in the Clear Creek restoration area, Shasta County, California
Clear Creek, one of the major tributaries of the upper Sacramento River, drains the eastern Trinity Mountains. Alluvial plain and terrace gravels of lower Clear Creek, at the northwest edge of the Sacramento Valley, contain placer gold that has been mined since the Gold Rush by various methods including dredging. In addition, from the 1950s to the 1980s aggregate-mining operations removed gravel f
Authors
Roger P. Ashley, James J. Rytuba, Ronald Rogers, Boris B. Kotlyar, David Lawler
Rationale and operational plan for a U.S. high-altitude magnetic survey
On August 8, 2002, twenty-one scientists from the federal, private and academic sectors met at a workshop in Denver, Co., to discuss the feasibility of collecting magnetic anomaly data on a Canberra aircraft (Figure 1). The need for this 1-day workshop arose because of an exciting and cost-effective opportunity to collect invaluable magnetic anomaly data during a Canberra mission over the U.S. in
Authors
Thomas G. Hildenbrand, Mario Acuna, Robert E. Bracken, Doug Hardwick, William J. Hinze, Gordon R. Keller, Jeff Phillips, Walter Roest
Shaded relief, topographic slope, and land use planning in the Los Altos Hills area, California - an example of the use of elevation data
No abstract available.
Authors
Suzanna K. Brooks, Arthur H. Lachenbruch, Carl M. Wentworth
Mineralogical characterization of weathered and less weathered strata of the Meade Peak phosphatic shale member of the Permian Phosphoria Formation: Measured sections E and F, Rasmussen Ridge, and measured sections G and H, Sage Creek area of the Webster
The Permian Phosphoria Formation of the western U.S. includes one of the largest
phosphate deposits in the world. Despite the economic significance of this formation, its
fine-grained nature has discouraged detailed mineralogical characterization and
quantitative studies. Recently, selenium and other potentially hazardous trace elements
in mine wastes have drawn increased attention to these rocks
Authors
A. C. Knudsen, M. E. Gunter, J. R. Herring, R. I. Grauch
Preliminary gravity inversion model of Frenchman Flat Basin, Nevada Test Site, Nevada
The depth of the basin beneath Frenchman Flat is estimated using a gravity inversion method. Gamma-gamma density logs from two wells in Frenchman Flat constrained the density profiles used to create the gravity inversion model. Three initial models were considered using data from one well, then a final model is proposed based on new information from the second well. The preferred model indicates t
Authors
Geoffrey A. Phelps, Scott E. Graham
Evaluation of airborne thermal-infrared image data for monitoring aquatic habitats and cultural resources within the Grand Canyon
This study examined thermal-infrared (TIR) image data acquired using the airborne Advanced Thematic Mapper (ATM) sensor in the afternoon of July 25th, 2000 over a portion of the Colorado River corridor to determine the capability of these 100-cm resolution data to address some biologic and cultural resource requirements for GCMRC. The requirements investigated included the mapping of warm backwate
Authors
Philip A. Davis