Skip to main content
U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Results

36967 results.

Alternate formats: RIS file of the first 3000 search results  |  Download all results as CSV | TSV | Excel  |  RSS feed based on this search  |  JSON version of this page of results

Page 1215, results 30351 - 30375

Show results on a map

Publication Extents

Not all publications have extents, not all extents are completely accurate
Streamflow measurement network review for hydroelectric power applications in Brazil
Francis T. Schaefer
1974, Open-File Report 74-357
This review of selected segments of the stream-gaging network of Brazil was undertaken by the writer in March and April, 1973, pursuant to an agreement between Companhia de Pesquisa de Recursos Minerais (CPRM) and Centrais Eletricas Brasileiras S.A. (ELETROBRAS) as a part of the cooperative program of the U.S. Geological...
Hard iron ore at the Cliffs Shaft Mines, Ishpeming, Michigan
Jacob Eugene Gair
1974, Open-File Report 74-227
At the Cliffs Shaft Mines, for many years the premiere hard iron ore mine of Michigan, bodies of ore typically are localized in the upper part of the Negaunee iron-formation, close beneath Goodrich Quartzite in the axial part of the Marquette synclinorium. Individual ore bodies may be as much as...
Tin resources of Brazil
Max Gregg White
1974, Open-File Report 74-333
Annual tin production in Brazil, most of it from cassiterite placer deposits in Rondonia Territory, amounts to about 4,000 metric tons (4,400 short tons) of concentrate containing 66 percent tin, much of which is consumed by Brazilian industry. Reserves of cassiterite concentrate in the placers of Rondonia district are estimated at...
Tungsten resources of Brazil
Max Gregg White
1974, Open-File Report 74-332
Brazilian tungsten production, 85 percent of which is exported, comes almost entirely from scheelite-bearing tactites in northeast Brazil, and has reached an annual rate of about 2,000 metric tons (2,200 short tons) of scheelite concentrate with 70 percent WO3. Scheelite ore reserves, located principally in the State of Rio Grande...
Geothermal investigations in Idaho, Part 2, An evaluation of thermal water in the Bruneau-Grand View area, southwest Idaho, with a section on a reconnaissance audio-magnetotelluric survey
H.W. Young, R.L. Whitehead, Donald B. Hoover, C. L. Tippens
1974, Open-File Report 74-221
The Bruneau-Grand View area occupies about 1,100 square miles in southwest Idaho and is on the southern flank of the large depression (possibly a graben) in which lies the western Snake River Plain. The igneous and sedimentary rocks in the area range in age from Late Cretaceous to Holocene. They...
Water supply at Painted Canyon Overlook, Theodore Roosevelt National Memorial Park (South Unit), southwestern North Dakota
M.G. Croft
1974, Open-File Report 74-136
A 1,930-foot (588-metre) water-supply well was constructed at the Painted Canyon Overlook, Theodore Roosevelt National Memorial Park (South Unit), southwestern North Dakota. Aquifers underlying the site are in rocks of Late Cretaceous and Tertiary age. These rocks have an aggreqate thickness of about 2,000 feet (610 metres). The well screen...
Reconnaissance engineering geology of Sitka and vicinity, Alaska, with emphasis on evaluation of earthquake and other geologic hazards
Lynn A. Yehle
1974, Open-File Report 74-53
A program to study the engineering geology of most of the larger Alaska coastal communities and to evaluate their earthquake and other geologic hazards was started following the 1964 Alaska earthquake; this report about Sitka and vicinity is a product of that program. Field-study methods were of a reconnaissance nature,...
Land-surface subsidence in the Houston-Galveston region, Texas
R.K. Gabrysch, C.W. Bonnet
1974, Open-File Report 74-123
The pumping of large amounts of ground water in the Houston-Galveston region, Texas, has resulted in water-level declines of as much as 200 feet (61 metres) in wells completed in the Chicot aquifer and as much as 325 feet (99 metres) in wells completed in the Evangeline aquifer during 1943-73....
Soft-water zone in the Chicot Aquifer, Bayou Teche area, Louisiana
R.L. Hosman
1974, Open-File Report 74-65
Test drilling in the vicinity of Bayou Teche in St. Martin Parish in southern Louisiana has disclosed a zone of soft water in the basal unit of the Chicot aquifer; the Chicot aquifer system blankets all southwestern Louisiana. Fresh water, which is defined as containing 250 milligrams per liter chloride...
Viking rover studies
Harold Masursky, Joseph M. Boyce, Arthur L. Dial
1974, Open-File Report 74-212
Intensive study of Mariner 9 data has resulted in an understanding--although far from complete--of the geologic processes affecting the Martian surface and of its history of development. The results are briefly summarized in the following section. The second section consists of geologic studies of four widely separated areas on Mars...
Hydrology of the abandoned coal mines in the Wyoming Valley, Pennsylvania
Jerrald R. Hollowell
1974, Open-File Report 74-237
Mine-water discharge, into the Susquehanna River degrades the river's quality during periods of low flow to a point critical for subsistence of aquatic life. To determine what measures are required to provide a better quality mine-water discharge in the Wyoming Valley, mine hydrology and mine-water quality are related to mine-pool...
A tabulation of K-Ar, Rb-Sr, and Pb-α ages obtained for materials within the United States (including Alaska and Hawaii) during the years 1965 through 1968
Richard F. Marvin
1974, Open-File Report 74-1069
This tabulation of ages has been made as a convenience to anyone desiring a quick reference to ages published in the United States and Puerto Rico from 1965 through 1968. This tabulation does not include all published K-Ar, Rb-Sr, or Pb-α ages, but is probably 98 percent complete. Many of...