Geology topics

Craig A. Curtis

Publications and source records attributed to Craig A. Curtis.

4 recordsLinked to original sources

USGS1978

Analyses and description of soil samples from Mountain Lake and Peters Mountain Wilderness Study areas, Virginia and West Virginia

Semiquantitative emission spectrographic analyses for 30 elements and atomic absorption analysis for zinc on 98 soil samples are reported here in detail. Location for all samples are in Universal Transverse Mercator (UTM) coordinates. A few samples of soil developed on Lower Devonian sandstone and chert contain more barium and zinc than soils on other formations but do not suggest the occurrence of economic concentrations of either element.

Open-File Report↗

USGS1978

Lithium in rocks from the Lincoln, Helena, and Townsend areas, Montana

In anticipation of increased demand for lithium for energy-related uses, the U.S. Geological Survey has been appraising the lithium resources of the United States and investigating occurrences of lithium. Analyses of samples of chiefly lacustrine rocks of Oligocene age collected by M. R. Mudge near Lincoln, Mont. showed as much as 1,500 ppm lithium. Since then we have sampled the area in greater detail, and have sampled rocks of similar ages in the Helena and Townsend valleys. The lithium-rich beds crop out in a band about 1.3 km long by 0.3 km wide near the head of Beaver Creek, about 14 km northwest of Lincoln, Mont. These beds consist of laminated marlstone, oil shale, carbonaceous shale, limestone, conglomerate, and tuff. Some parts of this sequence average almost 0.1 percent lithium. The lithium-bearing rocks are too low in grade and volume to be economic. Samples of sedimentary rocks of Oligocene age from the Helena and Townsend valleys in the vicinity of Helena, Mont. were generally low in lithium (3-40 ppm). However, samples of rhyolites from the western side of the Helena valley and from the Lava Mountain area were slightly above average in lithium content (6-200 ppm).

Open-File Report↗

USGS1978

Analyses of rocks and stream sediments of the Superstition Wilderness, Arizona

The geochemical investigation of the Superstition Wilderness, Maricopa, Pinal and Gila Counties, Arizona, consisted of the collection and analyses of 2269 samples. This included 1231 rocks and 1038 stream sediments. All samples were prepared and analyzed on location during two separate field seasons (fall of 1975 and 1976) by mobile laboratories of the U.S. Geological Survey. Sample localities and analytical results are listed in this report. Samples lie within the following U.S.G.S. topographic quadrangles: Goldfield, Mormon Flat Dam, Weavers Needle, Horse Mesa Dam, Iron Mountain, Pinyon Mountain, Haunted Canyon, and Two Bar Mountain. Locations for all samples are in Universal Transverse Mercator (UTM) coordinates, the X coordinate is the northing value, which ranges from 3,693,000 m to 3,720,000 m and the Y coordinate is the casting value, which ranges from 453,500 m to 500,000 m. Because of limitations of the computer program, the initial digit of the northing numbers has been dropped. Data of rocks are listed on Table 1 and stream sediments on Table 2. The analytical and geologic data were entered into a computer storage system (RASS II) by S. K. McDanal and retrievals were handled by T. M. Billings and George VanTrump. Geochemical sampling was carried out during geologic mapping by a U.S. Geological Survey field party consisting of D. W. Peterson, D. L. Gaskill, M. L. Sorenson, and W. E. Yeend, assisted by Kerwin Stark, N. H. Suneson, and G. D. Johnpeer. Analytical support was given by R. N. Babcock and D. G. Murrey.

Arizona↗

USGS1977

Analyses of stream sediment, soil, and rock samples from New River Gorge area, Fayette, Raleigh, and Summers counties, West Virginia

The analyses reported in this open-file report are on samples collected in April 1976 by John P. D'Agostino, George E. Ericksen, Frank G. Lesure, Robert W. Luce, Paul L. Weis, and Jesse W. Whitlow, assisted by Andrew E. Grosz and J. Thomas Hanley, and on a few samples collected in November 1976, by Whitlow and Grosz. Location of samples and discussion of the results are given by Lesure and Whitlow (1977).

West Virginia↗