Publications
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U.S. Geological Survey studies of water co-produced with oil and gas: Implications for future petroleum resource development
The U.S. Geological Survey is conducting research on the impacts of produced waters on petroleum resource development and the environment. Ongoing multidisciplinary investigations are focused on the 1) quantity and quality of current water production, 2) geologic and geochemical parameters that influence the viability of injection wells, and 3) processes that affect the dispersion of inorganic and
Authors
George N. Breit, Yousif K. Kharaka, Robert A. Zielinski, C. A. Rice, Bruce D. Smith, Jennie L. Ridgley
Vertical axis rotations in the Mojave: Evidence from the Independence dike swarm: Comment and Reply
No abstract available.
Authors
Keith A. Howard, R.F. Hopson, Hagai Ron, Amos Nur
Rasgos geologicos y movimientos de ladera en el sector Izbor-Velez Benaudalla de la cuenca del Rio Guadalfeo (Granada)
No abstract available.
Authors
T.F. Castillo, E. E. Brabb, F.D. Salazar, Augustin Martin-Algarra, C.F. Irigary, A.R. Estevez, J. Chacon
Preliminary geologic map of the Burbank 7.5' quadrangle, southern California: A digital database
This Open-File report is a digital geologic map database. This pamphlet serves to introduce and describe the digital data. There is no paper map included in the Open-File report.
This digital map database is compiled from previously published sources combined with some new mapping and modifications in nomenclature. The geologic map database delineates map units that are identified by general age
Authors
R.F. Yerkes
Preliminary geologic map of the Mint Canyon 7.5' quadrangle, southern California: A digital database
This Open-File report is a digital geologic map database. This pamphlet serves to introduce and describe the digital data. There is no paper map included in the Open-File report.
This digital map database is compiled from previously published sources combined with some new mapping and modifications in nomenclature. The geologic map database delineates map units that are identified by general age
Authors
R.F. Yerkes
Quaternary geology of Alameda County, and parts of Contra Costa, Santa Clara, San Mateo, San Francisco, Stanislaus, and San Joaquin Counties, California: A digital database
Alameda County is located at the northern end of the Diablo Range of Central California. It is bounded on the north by the south flank of Mount Diablo, one of the highest peaks in the Bay Area, reaching an elevation of 1173 meters (3,849 ft). San Francisco Bay forms the western boundary, the San Joaquin Valley borders it on the east and an arbitrary line from the Bay into the Diablo Range forms th
Authors
E. J. Helley, R. W. Graymer
Classification of mineral deposits into types using mineralogy with a probabilistic neural network
In order to determine whether it is desirable to quantify mineral-deposit models further, a test of the ability of a probabilistic neural network to classify deposits into types based on mineralogy was conducted. Presence or absence of ore and alteration mineralogy in well-typed deposits were used to train the network. To reduce the number of minerals considered, the analyzed data were restricted
Authors
Donald A. Singer, Ryoichi Kouda
An 800,000-year pollen record from Owens Lake, California: Preliminary analyses
A long sequence of fossil palynomorph assemblages from a 323-m-long core taken at Owens Lake has enabled us to evaluate the gross vegetational trends for the Owens Valley region of California over the past ~800,000 years. Shifts in vegetation composition and abundance in the study area during the Pleistocene were indicated in core sediments by marked fluctuations in the pollen frequencies of pines
Authors
Ronald J. Litwin, D.P. Adam, N. O. Frederiksen, W. B. Woolfenden
Mass balance approach to selenium cycling through the San Joaquin Valley, sources to river to bay
Surface and ground waters of the Central Valley of California (e.g., rivers, dams, off-stream storage reservoirs, pumping facilities, irrigation and drinking water supply canals, agricultural drainage canals) are part of a hydrologic system that makes up a complex ecosystem extending from the riparian wetlands of the Sacramento and San Joaquin Rivers through the San Francisco Bay/Delta Estuary to
Authors
Theresa S. Presser, David Z. Piper
Geochemistry of oils from the Junggar basin, northwest China
The Junggar basin of northwestern China is a structural basin containing a thick sequence of Paleozoic-Pleistocene rocks with estimated oil reserves of as much as 5 billion bbl. Analyses of 19 oil samples from nine producing fields and two oil-stained cores in the Junggar basin revealed the presence of at least five genetic oil types. The geochemistry of the oils indicates source organic matter de
Authors
J. L. Clayton, J. Yang, J. D. King, P. G. Lillis, A. Warden
The Blake Nose Cretaceous-Paleogene (Florida Atlantic margin, ODP Leg 171 B): An exemplar record of the Maastrichtian-Danian transition
During ODP Leg 171B, devoted to the analysis of the Blake Plateau margin in front of Florida, 16 holes have been drilled in 5 distinct sites. The sites have documented a sedimentary succession ranging in age from Aptian to Eocene. Emphasis has been put on critical periods, comprising the Paleocene-Eocene transition, the Cretaceous-Tertiary boundary which has been cored in excellent conditions, the
Authors
J. -P. Bellier, S. Marca, Richard D. Norris, D. Kroon, A. Klaus, I. T. Alexander, L. P. Bardot, Charles E. Barker, Charles D. Blome, L. J. Clarke, J. Erbacher, K. L. Faul, M. A. Holmes, Brian T. Huber, Miriam E. Katz, Kenneth G. MacLeod, F. C. Martinez-Ruiz, I. Mita, M. Nakai, James G. Ogg, Dorothy K. Pak, T. K. Pletsch, Jean Self-Trail, N. J. Shackleton, J. Smit, William Ussler, David K. Watkins, J. Widmark, Paul A. Wilson
Use of a neural network to integrate geoscience information in the classification of mineral deposits and occurrences
No abstract available.
Authors
Donald A. Singer, Ryoichi Kouda