Petrography and petrology of the Middlefield Granite
Russell Gould Clark Jr.
1968, Open-File Report 68-36
Analysis of multisensor data, autometric operation
Raytheon Co.
1968, Open-File Report 69-214
Metallic mineral resources map of the Bradfield Canal Quadrangle, Alaska
1968, Open-File Report 68-41
No abstract available. ...
Metallic mineral resources map of the Shungnak Quadrangle, Alaska
1968, Open-File Report 68-56
No abstract available. ...
Metallic mineral resources map of the Sitka Quadrangle, Alaska
1968, Open-File Report 68-57
No abstract available. ...
Silent Canyon volcanic center, Nye County, Nevada
Donald C. Noble, K. A. Sargent, H. H. Mehnert, E. B. Ekren, F.M. Byers Jr.
1968, Open-File Report 68-343
Metallic mineral resources map of the Skagway Quadrangle, Alaska
1968, Open-File Report 68-58
No abstract available. ...
Metallic mineral resources map of the Sumdum Quadrangle, Alaska
1968, Open-File Report 68-59
No abstract available. ...
Metallic mineral resources map of the Teller quadrangle, Alaska
Edward Huntington Cobb, C.L. Sainsbury
1968, Open-File Report 68-61
Metallic mineral resources map of the Ruby Quadrangle, Alaska
1968, Open-File Report 68-55
No abstract available. ...
Metallic mineral resources map of the Port Alexander quadrangle, Alaska
1968, Open-File Report 68-54
No abstract available. ...
Metallic mineral resources map of the Petersburg quadrangle, Alaska
1968, Open-File Report 68-53
No abstract available. ...
An atomic-absorption method for the determination of gold in large samples of geologic materials
Gordon H. VanSickle, Hubert William Lakin
1968, Circular 561
A laboratory method for the determination of gold in large (100-gram) samples has been developed for use in the study of the gold content of placer deposits and of trace amounts of gold in other geologic materials. In this method the sample is digested with bromine and ethyl ether, the...
Index of surface-water records to September 30, 1967 - Alaska
H.P. Eisenhuth
1968, Circular 585
Index of surface-water records to September 30, 1967: Part 9. - Colorado River basin
H.P. Eisenhuth
1968, Circular 579
This report lists the streamflow and reservoir stations in the Colorado River basin for which records have been or are to be published in reports of the Geological Survey for periods through September 30, 1967. It supersedes Geological Survey Circular 509....
Distribution of gold, copper, and some other metals in the McCarthy B-4 and B-5 quadrangles, Alaska
E. M. MacKevett, James G. Smith
1968, Circular 604
General procedure for gaging streams
R. W. Carter, Jacob Davidian
1968, Techniques of Water-Resources Investigations 03-A6
This chapter briefly describes the objectives and procedures used in obtaining streamflow records. It is considered an introduction to other chapters on surface-water techniques which treat individual procedures in greater detail....
Sand and gravel on the continental shelf off the northeastern United States
John Stevens Schlee
1968, Circular 602
Geochemical and geophysical anomalies in the western part of the Sheep Creek Range, Lander County, Nevada
Garland Bayard Gott, Charles J. Zablocki
1968, Circular 595
Extensive geochemical anomalies are present along the west side of the Sheep Creek Range in Lander County, Nev. Anomalous concentrations of zinc, arsenic, mercury, silver, copper, lead, and to some extent gold, molybdenum, and antimony occur in iron-rich material along fracture planes and in quartz veins in Paleozoic formations. A...
Stage measurement at gaging stations
Thomas J. Buchanan, William P. Somers
1968, Techniques of Water-Resources Investigations 03-A7
Continuous measurements of stream stage are used in determining records of stream discharge. In addition a record of stream stage is useful in itself, as in designing structures affected by stream elevation or in planning the use of flood plains. This report describes instruments and structures commonly used in obtaining...
Index of surface-water records to September 30, 1967 - Part 2, South Atlantic slope and eastern Gulf of Mexico basins
B.A. Anderson, C.B. Ham
1968, Circular 572
Geochemical anomalies in the Swales Mountain area, Elko County, Nevada
Keith Brindley Ketner, James George Evans, Thomas D. Hessin
1968, Circular 588
Gold in meteorites and in the earth's crust
Robert Sprague Jones
1968, Circular 603
The reported gold contents of meteorites range from 0.0003 to 8.74 parts per million. Gold is siderophilic, and the greatest amounts in meteorites are in the iron phases. Estimates ,of the gold content of the earth's crust are in the range of 0.001 to 0.006 parts per million....
Index of surface-water records to September 30, 1967 - Part 1, North Atlantic slope basins
B.A. Anderson, C.B. Ham
1968, Circular 571
Reports and maps of the Geological Survey released only in the open files, 1967
Betsy A. Weld, Margaret S. Griffin, George W. Brett
1968, Circular 548