Determination of gold in geologic materials by solvent extraction and atomic-absorption spectrometry
Claude Huffman, J.D. Mensik, L.B. Riley
1967, Circular 544
The two methods presented for the determination of traces of gold in geologic materials are the cyanide atomic-absorption method and the fire-assay atomic-absorption method. In the cyanide method gold is leached with a sodium-cyanide solution. The monovalent gold is then oxidized to the trivalent state and concentrated by extracting into...
Measurement of peak discharge at dams by indirect methods
Harry Hulsing
1967, Techniques of Water-Resources Investigations 03-A5
This chapter describes procedures for measuring peak discharges using dams, weirs, and embankments. Field and office procedures limited to this method are described. Discharge coefficients and formulas are given for three general classes of weirs-sharp-crested, broad-crested, and round-crested-and for highway embankments and weirs of unusual shape. The effects of...
Floods on Otter Creek in Linn County, Iowa
H.H. Schwob
1967, Open-File Report 67-195
No abstract available....
Economic significance of revised age relations of rocks in the Cornucopia mining district, Elko County, Nevada
Robert Roy Coats
1967, Circular 549
Recent geologic work in the Cornucopia mining district, a small silver-gold mining district in northwestern Elko County, Nev., has resulted in significant revision of the geological interpretation. Rocks formerly thought to be premineralization in age, but unmineralized, are now known to be postmineral extrusives, resting unconformably on the altered andesite...
Marine sediment sample preparation for analysis for low concentrations of fine detrital gold
H. Edward Clifton, Arthur Hubert, R. Lawrence Phillips
1967, Circular 545
Analyses by atomic absorption for detrital gold in more than 2,000 beach, offshore, marine-terrace, and alluvial sands from southern Oregon have shown that the values determined from raw or unconcentrated sediment containing small amounts of gold are neither reproducible nor representative of the initial sample. This difficulty results from a...
Floods in Rock River basin, Iowa
P.J. Carpenter
1967, Open-File Report 67-36
No abstract available...
Distribution and geologic habitat of marine halite and associated potash deposits
R. J. Hite
1967, Open-File Report 67-113
No abstract available....
Copper analysis of selected samples, southwest Brooks Range, Alaska
W. P. Brosge, H. N. Reiser, I.L. Tailleur
1967, Open-File Report 67-29
No abstract available....
Younger Precambrian geology in southern Arizona
Andrew F. Shride
1967, Professional Paper 566
Magnitude and frequency of floods in the United States, part 11. Pacific slope basin in California: Vol.1. Coastal basins south of the Klamath River basin and Central Valley drainage from the West
L. E. Young, R.W. Cruff
1967, Water Supply Paper 1685
No abstract available....
Cambrian and Precambrian rocks of the Groom district, Nevada, southern Great Basin
Harley Barnes, Robert L. Christiansen
1967, Bulletin 1244-G
Areas within which public oil shale lands are withdrawn by Executive Order 5327, (this is a current interpretation and is subject to revision with new information)
Water Resources Division, U.S. Geological Survey
1967, Open-File Report 67-258
Petrology and structure of Precambrian rocks, Central City quadrangle, Colorado
P.K. Sims, D. J. Gable
1967, Professional Paper 554-E
Hydrology of the National Reactor Testing Station, Idaho, 1966
J.T. Barraclough, W.E. Teasdale, J.B. Robertson, R. G. Jensen
1967, Open-File Report 67-12
The nature of batholiths
Warren Hamilton, W. B. Myers
1967, Professional Paper 554-C
Geologic map of the Monomoy Point quadrangle, Barnstable County, Massachusetts
Carl Koteff, R. N. Oldale, J. H. Hartshorn
1967, Open-File Report 67-139
Rehabilitation of wells 13, 14, 15, 16, and 17, Headquarters area, White Sands Missile Range, New Mexico
J.A. Basler
1967, Open-File Report 67-13
Preliminary results of the investigation of the saline-water resources in the Hueco Bolson near El Paso, Texas
M. E. Davis, E. R. Leggat
1967, Open-File Report 67-79
The Hueco Bolson, as defined in this report, is in the extreme western part of Texas and includes that part of El Paso County between the Franklin and Hueco Mountains north of the Rio Grande....
Coal resources of Alaska
Farrell F. Barnes
1967, Bulletin 1242-B
Water-resources inventory for 1966, Antelope Valley-East Kern Water Agency area, California
R. M. Bloyd Jr.
1967, Open-File Report 67-20
Phosphate deposits in the Jawf-Sakakah basin, Kingdom of Saudi Arabia, Part II: Thaniyat Turayf and Quraymiz
James W. Mytton
1967, Open-File Report 67-168
Floods in the Ponce area, Puerto Rico
Irby J. Hickenlooper, M. A. Lopez
1967, Hydrologic Atlas 261
Petrography of the Athol quadrangle, Massachusetts
Anita Louise Mook
1967, Open-File Report 68-185
The Athol quadrangle of north-central Massachusetts is underlain by high-grade metamorphosed amphibolites, gneisses, schists, calc-silicate gneisses, quartzites, and orthogneisses. These include the Monson Gneiss of Middle Ordovician or older age, the Partridge Formation of Middle Ordovician age, and the Middle to Late Devonian Hardwick Granite of the New Hampshire Plutonic...
Geologic framework and petroleum potential of the Atlantic Coastal Plain and continental shelf, with a section on stratigraphy
John Charles Maher, Esther English Richards Applin
1967, Open-File Report 67-152
The Atlantic Coastal Plain and Continental Shelf of North America is represented by a belt of Mesozoic and Cenozoic rocks, 150 to 300 miles wide and 2,400 miles long, extending from southern Florida to the Grand Banks of Newfoundland. This belt of Mesozoic and Cenozoic rocks encompasses an area of...
Geologic map of the Wofford quadrangle, Whitley County, Kentucky
J. Hiram Smith
1967, Geologic Quadrangle 617
