Geology topics
Research about Nevada
Source-linked reports with geographic coverage including Nevada.
Water-quality characteristics and nutrient and suspended-sediment loads, Carson River and Truckee Canal, western Nevada, water year 1980
Lahontan Reservoir is a major recreational site in the Carson River basin in western Nevada. The reservoir is fed by the Carson River and by the Truckee Canal which transports water from the adjacent Truckee River. Water quality in both rivers is influenced by agriculture and urbanization. Specific conductance tended to increase in a downstream direction. Generally, pH values ranged from 7.0 to 8.8. Dissolved-oxygen concentrations were greater than 5 milligrams/L. Calcium and sodium were the dominant cations and bicarbonate the dominant anion. Suspended-sediment concentrations ranged from 3 to 1,790 milligrams/L. Ultimate carbonaceous biochemical oxygen demand ranged from 1.2 to 19.6 milligrams/L. The codominant algal groups were the blue-greens, greens, and diatoms. Background total nutrient and suspended-sediment loads were about 490 tons nitrogen, 130 tons phosphorus, and 200,000 tons suspended sediment. Total nutrient and suspended-sediment loads to Lahontan Reservoir were about 980 tons nitrogen, 300 tons phosphorus, and 300,000 tons suspended sediment. Loads to the lower Carson River from the reservoir were about 820 tons total nitrogen, 180 tons total phosphorus, and 26,000 tons suspended sediment.
Beatty, Nevada: A section in U.S. Geological Survey research in radioactive waste disposal - Fiscal years 1983, 1984, and 1985 (WRI 87-4009)
A commercial low-level radioactive-waste disposal site has been operating near Beatty, Nevada, about 150 km northwest of Las Vegas, since 1962. The 32-ha site is situated in a desolate region of the Amargosa River Valley, sometimes referred to as the Amargosa Desert. Average annual precipitation is only about 114 mm. The site is underlain by 175 m of unconsolidated, generally coarse-grained, alluvial-fan and flood-plain deposits. The water table is at a depth of 90 m.
Rock-water interaction in ash-flow tuffs (Yucca Mountain, Nevada, USA)- The record from uranium studies
Forty-eight core samples of ash-flow tuffs from Yucca Mountain, NV, were selected for comparative analysis by uranium-based methods to estimate past interaction with oxidizing water. Results aid in the selection of hydrologically isolated host rocks for radioactive waste disposal. U abundances were consistently more variable than thorium in whole rocks, suggesting some selective redistribution of U. Dissolved U correlates most strongly with dissolved manganese, indicating a predominant association of U with manganese oxides.
Impact of time and climate on Quaternary soils in the Yucca Mountain area of the Nevada Test Site
No abstract available.
Landsat multispectral scanner and Landsat thematic mapper images and interpretations of Hannapah and the Royston Hills, Nevada
This Open-File Report consists of twenty-one 35-mm slides showing material that was presented at the Fourth Thematic Conference on Remote Sensing of the Environment held in San Francisco, California on April 1-4, 1985 (Purdy and others, 1985). The work was carried out in conjunction with the U.S. Geological Survey's Conterminous U.S. Mineral Appraisal Program for the Tonopah, Nevada 1° by 2° quadrangle (fig. 1). The slides show Landsat Multispectral Scanner (MSS) images, Landsat Thematic Mapper (TM) images, and geologic interpretations made from these data.
Geochemical signature of the Divide silver-gold district, Esmeralda County, Nevada
No abstract available.
Data report for the 1985 seismic-refraction experiment at Yucca Mountain and vicinity, southwestern Nevada
No abstract available.
Geology of the Carlin gold deposit, Nevada
This report describes the geology of the Carlin gold deposit and the Lynn mining district, including an area of about 80km 2 in northern Eureka County, Nev. (fig. 1). The Carlin mine is located in secs. 13 and 14, T.35N., R.50E., at an elevation of 6,400 ft near the crest of the Tuscarora Mountains. The map area (pl. 1), centered approximately on the Carlin mine, measures about 10km east-west by 8km north-south and forms approximately the south two-thirds of the Rodeo Creek NE. 7{1/2}-minute quadrangle. Boundaries for the map area are meridians 116°15'00" and 116°22'30" W. and parallels 40°52'30" and 40°57'30"N. The Carlin mine is accessible by an asphalt-surfaced road extending about 35km northward from the town of Carlin, Nev., which is on U.S. Highway 40. A secondary improved road extends from the Carlin mine westward into Boulder Valley and connects with both State Highway 18 to the north and U.S. Highway 40 to the south near the town of Dunphy. An unimproved road extends from the Carlin mine northward, along the west side of Little Boulder Basin, to the Blue Star mine, and continues northward and westward along Rodeo Creek to connect with a graded road extending northeastward along Boulder Valley. Numerous unimproved roads have been built to provide access to the different mining prospects.
Vegetation and climates of the last 45,000 years in the vicinity of the Nevada Test Site, south-central Nevada
No abstract available.
Water resources data, Nevada, water year 1985
Water-resources data published herein for the 1984 water year comprise the following records: o Water discharge for 89 gaging stations on streams, canals, and drains. o Discharge data for 43 peak-flow stations, 2 low-flow stations on streams, and 41 springs. o Stage and contents for 14 lakes and reservoirs. o Water levels for 298 observation wells. o Water-quality data for 23 stream, canal, and drain sites, 3 lake and reservoir sites, and 5 wells. o Precipitation totals for 10 stations. Additional water data, collected at various sites that are not part of the systematic data-collection program, are published as miscellaneous measurements. These data represent that part of the National Water Data System operated by the U.S. Geological Survey and cooperating State and Federal agencies in Nevada.