1977, Report, Task 5: aquatic habitat enhancement/development scenarios
No abstract available....
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Publication Extents
Not all publications have extents, not all extents are completely accurateWayne Nelson, Gerry C. Horak, M. Lewis
1977, Report, Task 2: Critical evaluation of habitat and population improvement measures
No abstract available....
F.H. Tovar, S.M. Brown
1977, Report
No abstract available....
R. A. Rappmund
1977, Edwards Underground Water District Bulletin 36
No abstract available....
T. J. Conomos, D. H. Peterson
1977, Book chapter, Estuarine processes: circulation, sediments, and transfer of material in the estuary
Differences in the relative magnitude and timing of wind stress and river inflow in the northern and southern reaches of San Francisco Bay create different sedimentary conditions. The northern reach is a partially to well mixed estuary receiving most of the total annual fresh-water input (840 m3 sec−1) and suspended sediment...
Mark D. Zoback, F. Rummel, R. Jung, C.B. Raleigh
1977, International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts (14) 49-58
Laboratory hydraulic fracturing experiments were conducted to investigate two factors which could influence the use of the hydrofrac technique for in-situ stress determinations; the possible dependence of the breakdown pressure upon the rate of borehole pressurization, and the influence of pre-existing cracks on the orientation of generated fractures. The experiments...
David A. Brew, Donald Grybeck, Bruce R. Johnson, Robert C. Jachens, C.J. Nutt, D.F. Barnes, A.L. Kimball, J.C. Still, J.L. Rataj
1977, Open-File Report 77-649
The Wilderness Study Area consists of about 322,300 hectares (1,250 square miles or 796,400 acres) on the southwest side of the Coast Range in southeastern Alaska about 72 km (45 miles) southeast of Juneau, Alaska (fig. 1). An additional 142,800 hectares (550 square miles or 352,900 acres) lying in part...
N.L. Nehring, P.A. Bowen, A.H. Truesdell
1977, Geothermics (5) 63-66
The fractionation of oxygen isotopes between dissolved sulfate ions and water provides a useful geothermometer for geothermal waters. The oxygen isotope composition of dissolved sulfate may also be used to indicate the source of the sulfate and processes of formation. The methods described here for separation, purification and reduction of...
D. Kirk Nordstrom, E. A. Jenne
1977, Geochimica et Cosmochimica Acta (41) 175-188
Calculation of chemical equilibria in 351 hot springs and surface waters from selected geothermal areas in the western United States indicate that the solubility of the mineral fluorite, CaF2, provides an equilibrium control on dissolved fluoride activity. Waters that are undersaturated...
J.D. Hem
1977, Geochimica et Cosmochimica Acta (41) 527-538
Cu, Ag and Cr concentrations in natural water may be lowered by mild chemical reduction involving ferric hydroxide-ferrous ion redox processes. V and Mo solubilities may be controlled by precipitation of ferrous vanadate or molybdate. Concentrations as low as 10−8.00 or 10−9.00 M are readily attainable for all these metals in oxygen-depleted...
K.J. Wenrich-Verbeek
1977, Journal of Geochemical Exploration (8) 337-355
Optimum sampling methods in surface water and associated sediments for use in uranium exploration are being studied at thirty sites in Colorado, New Mexico, Arizona and Utah. For water samples, filtering is recommended to increase sample homogeneity and reproducibility because for most elements studied water samples which were allowed...
George Plafker
1977, Earthquake Information Bulletin (USGS) (9) 18-20
The main fault along which the destructive Guatemala earthquake occurred was the Motagua fault. Ground breakage was observed in a continuous, well-defined line for 230 km. At its closest point, the fault is 25 km north of Guatemala City. Surface displacement across the fault was dominantly horizontal and sinistral (see...
F. E. Senftle, R.M. Moxham, A.B. Tanner, P. W. Philbin, G. R. Boynton, R.E. Wager
1977, Geoexploration (15) 121-135
To evaluate the importance of variations in the neutron energy distribution in borehole activation analysis, capture gamma-ray measurements were made in relatively dry, low-porosity gabbro of the Duluth Complex. Although sections of over a meter of solid rock were encountered in the borehole, there was significant fracturing with interstitial water...
R. A. Cadigan, J.K. Felmlee
1977, Journal of Geochemical Exploration (8) 381-395
Radioactive mineral springs and wells at 33 localities in the States of Colorado, Utah, Arizona and New Mexico in the United States were sampled and studied to obtain geochemical data which might be used for U exploration.The major source of radioactivity at mineral spring sites is 226Ra. Minor amounts...
M. Fishman, Roberto Spencer
1977, Analytical Chemistry (49) 1599-1602
An automated method to determine both inorganic and organic forms of arsenic In water, water-suspended mixtures, and streambed materials Is described. Organic arsenic-containing compounds are decomposed by either ultraviolet radiation or by suHurlc acid-potassium persulfate digestion. The arsenic liberated, with Inorganic arsenic originally present, is reduced to arsine with sodium...
R. Summers, J. Byerlee
1977, International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts (14) 155-160
The frictional properties of fault gouge have been studied at confining pressures to 6 kbars. If the gouge is composed of strong materials such as crushed granite or quartz sand, the frictional strength is high, and violent stick-slip occurs at confining pressures above approximately 1.5 kbars. If the gouge is...
W.F. McKenzie, A.H. Truesdell
1977, Geothermics (5) 51-61
The oxygen isotope compositions of dissolved sulfate and water from hot springs and shallow drillholes have been tested as a geothermometer in three areas of the western United States. Limited analyses of spring and borehole fluids and existing experimental rate studies suggest that dissolved sulfate and water are probably in...
Kirkwood M. Cunningham, Marvin C. Goldberg, Eugene R. Weiner
1977, Analytical Chemistry (49) 70-75
The influence of experimental parameters on detection sensitivity was determined for laser Raman analysis of dissolved solutes in water. Individual solutions of nitrate, sulfate, carbonate, bicarbonate, monohydrogen phosphate, dihydrogen phosphate, acetate ion, and acetic acid were measured. An equation is derived which expresses the signal-to-noise ratio in terms of solute...
Josephus Thomas Jr., H.D. Glass, W.A. White, R.M. Trandel
1977, Clays and Clay Minerals (25) 278-284
A reliable method, utilizing a fluoride ion-selective electrode, is described for the determination of fluoride in clays and shales. Interference by aluminum and iron is minimal. The reproducibility of the method is about ±5% at different levels of fluoride concentration.Data are presented for various clay minerals and for the <2-µm...
M. J. Fishman, D. E. Erdmann
1977, Analytical Chemistry (49) 139-158
No abstract available....
B.F. Jones, H.P. Eugster, S.L. Rettig
1977, Geochimica et Cosmochimica Acta (41) 53-72
New and more complete compositional data are presented for a large number of water samples from the Lake Magadi area, Kenya. These water samples range from dilute inflow (<0.1 g/kg dissolved solids) to very concentrated brines (>300 g/kg dissolved solids). Five distinct hydrologic stages can be recognized in the evolution...
W. Seyfried, J. L. Bischoff
1977, Earth and Planetary Science Letters (34) 71-77
Seawater reacted with basaltic glass at 260°C and 500 bars under water-dominated conditions (50 : 1 water/rock ratio) efficiently leached and maintained heavy metals in solution. Cu, Zn, and Ba are transferred in significant proportions to the aqueous phase, while Fe...
J. L. Bischoff, R.J. Rosenbauer
1977, Earth and Planetary Science Letters (33) 379-388
Quaternary sediments cored in the northeast Pacific nodule area (DOMES site C, 14°N, 126°W) contain a significant amount of hydrothermal metalliferous mud. Water content, color, mineralogy, and chemical composition are analogous to metalliferous sediments of the subequatorial East Pacific Rise.Correction for contribution of pelagic clay indicates the metalliferous fraction to...
J. M. Kernodle, D. V. Whitesides
1977, Water-Resources Investigations Report 77-92
Ground-water levels in the alluvial aquifer in Louisville, Jefferson County, Kentucky, are rising at a rate which could cause wet basements and possible structural damage tc buildings in the downtown area by 1982. The predicted water level for 1982 is based on the nearly linear increase which has been observed...
Glenn C. Prescott
1977, Hydrologic Atlas 564
No abstract available....