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Page 5490, results 137226 - 137250

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Titanium deposits in alkalic igneous rocks
Norman Herz
1975, Open-File Report 75-35
Many types of alkalic rocks are enriched in Ti02 relative to the average for the crust. Silicate minerals in these rocks may have high Ti02 contents, but the oxides ilmenite, rutile, brookite, and perovskite are also characteristic primary phases. These tend to be higher in niobium than are the same...
Audio-magnetotelluric methods in reconnaissance geothermal exploration
Donald B. Hoover, Carl L. Long
1975, Open-File Report 75-362
About three years ago, at the initiation of a major effort by the U.S. Geological Survey into studies of geothermal systems, a decision was made to evaluate the audio-magnetotelluric, AMT, technique for this application. At that time we had had no real experience with the method nor any equipment. Some...
Water resources of the Zumbro River watershed, southeastern Minnesota
H. W. Anderson Jr., D.F. Farrell, W.L. Broussard, M. F. Hult
1975, Hydrologic Atlas 543
The Zumbro River drains 1,428 square miles and falls from about 1,300 feet altitude in its headwaters to 665 feet at its mouth. The remaining 248 square miles included in the watershed is drained by small creeks flowing directly into the Mississippi River. Distribution of water use is about as...
Water resources of the Root River watershed, southeastern Minnesota
W.L. Broussard, D.F. Farrell, H. W. Anderson Jr., P.E. Felsheim
1975, Hydrologic Atlas 548
This Hydrologic Atlas is one of a series describing the 39 watersheds in Minnesota. The Root River watershed includes Houston, Winona, and parts of the surrounding counties. The 2 ,570 square miles in the watershed varies from gently rolling prairie in the west to an area of plateaus separated by...
High-gain, long-period seismograph station installation report, Kipapa, Hawaii
Charles R. Hutt
1975, Open-File Report 75-369
A High-Gain, Long-Period Seismograph System, developed by the Lamont-Doherty Geological Observatory, was installed at the Kipapa site of the Honolulu Observatory near Ewa Beach, Oahu, Hawaii in March 1972. Magnifications of 55,000 for the vertical component and 40,000 for the horizontal components were obtained. Velocity data are recorded both photographically...
High-gain, long-period seismograph station installation report, Matsushiro, Japan
Charles R. Hutt
1975, Open-File Report 75-100
A High-Gain, Long-Period Seismograph System was installed at Matsushiro, Japan, during November and December 1972. The system consists of two horizontal and one vertical seismometer with natural periods of 30 seconds. Each seismometer contains two velocity transducers and one displacement transducer....
WATSTORE: National Water Data Storage and Retrieval System of the U. S. Geological Survey; user's guide
Norman E. Hutchison
1975, Open-File Report 75-426
The U.S. Geological Survey investigates the occurrence , quantity, quality, distribution, and movement of the surface and underground water resources of the Nation. The investigations, which are conducted by the Water Resources Division, of the Survey include: systematic collection, analysis, and interpretation of water data; investigation of in and agricultural...
Water resources of the Cedar River watershed, southeastern Minnesota
D.F. Farrell, W.L. Broussard, H. W. Anderson Jr., M. F. Hult
1975, Hydrologic Atlas 552
The Cedar River Watershed Unit (as established by the states of Minnesota) consists of 1,204 square miles (3,118 square kilometres) of flat or gently undulating plain. The watershed is drained by the Cedar River and several smaller streams that flow south into Iowa and eventually into the Mississippi River. Its easternmost neck...
A geologic analysis of the Side-Looking Airborne Radar imagery of southern New England
Paul T. Banks
1975, Open-File Report 75-207
Analysis of the side looking airborn radar imagery of Massachusetts, Connecticut and Rhode Island indicates that radar shows the topography in great detail. Since bedrock geologic features are frequently expressed in the topography the radar lends itself to geologic interpretation. The radar was studied by comparisons with field mapped geologic...
Gravity and magnetic studies of The Geysers-Clear Lake geothermal region, California
William F. Isherwood
1975, Open-File Report 75-368
In order to explore for economic steam reservoirs, it is important to know the complete, three-dimensional geology which governs such a system. The Geysers-Clear Lake region California (figure 1), has the world's largest production of commercial power from a dry steam geothermal reservoir. This paper describes gravity and magnetic field...
Origin and age of postglacial deposits and assessment of potential hazards from future eruptions of Mount Baker, Washington
Jack H. Hyde, Dwight Raymond Crandell
1975, Open-File Report 75-286
Eruptions and other geologic processes at Mount Baker during the last 10,000 years have repeatedly affected adjacent areas, and especially the valleys that head at the volcano. Most mudflows from the volcano were caused by massive avalanches of volcanic rock that had been partly altered to clay by steam and...
Water availability of Choctaw County, Alabama
John G. Newton, Jerald F. McCain
1975, Open-File Report 75-477
Large quantities of ground water and surface water are available in Choctaw County. Major sources of ground water are the Nanafalia Formation, Tuscahoma Sand, Hatchetigbee Formation, and Gosport Sand and Lisbon Formation. The Nanafalia Formation is the most productive source of ground water, and individual wells will yield as much...