Gerald K. Czamanske (compiler)
1969, Economic Geology (64) 459-461
No abstract available....
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Publication Extents
Not all publications have extents, not all extents are completely accurateF.C.W. Dodge, V. K. Smith, R. E. Mays
1969, Journal of Petrology (10) 250-271
Biotites from plutonic rocks of the central Sierra Nevada and Inyo Mountains, California, have been examined and characterized by powder X-ray diffraction and optical and chemical methods.Compositions of the biotites define a trend in the compositional triangle Fe+3 Fe+2Mg. When related to the experimentally studied ternary system KFe3+3AlSisO12H-1-KFe3+2...
W. Scott Keys, A. R. Boulogne
1969, Conference Paper, SPWLA 10th Annual Logging Symposium
Californium 252 is an isotopic neutron source that has only recently become available for experimental well logging. One curie of 252Cf emits 4.4 x 109 neutrons per second by spontaneous fission, 300 times the emission rate of any other one curie radioisotopic source. California 252 has several other advantages...
Frank F. H. Wang, Michael J. Cruickshank
1969, Conference Paper, Offshore technology conference
Progress in marine hard mineral exploration and exploitation has been severely restricted by technologic gaps and the lack of discovery of deposits that can be exploited at a competitive price in the world markets. Immediate needs include improved techniques of placer drilling to permit more reliable evaluation of in situ...
M.A. Bogan, T.R. Mollhagen
1969, Southwestern Naturalist (14) 134-136
Asymmetry in tree crowns has been established for some time. Lawrence (Ecol. Monogr. 9:217-257, 1939) studied wind training, one cause of asymmetry, in the Columbia River Gorge. He and Boyce (Ecol. Monogr. 24: 29-67, 1954) cite the intensity and direction of wind during the growing season as the...
Richard C. Banks, Robert L. Brownell Jr.
1969, Journal of Mammalogy (50) 262-271
Delphinus bairdii Dall is a species of dolphin distinct from D. delphis Linnaeus, with which it has usually been synonymized. D. bairdii has a longer rostrum relative to the zygomatic width of the skull; the ratio of these measurements falls at 1.55 or above for bairdii and 1.53 and below for delphis. In the eastern Pacific Ocean, D. bairdii is found...
D.R. Shawe, F. G. Poole, Donald Albert Brobst
1969, Economic Geology (64) 245-254
No abstract available....
Donald C. Noble, Joseph Haffty, Carl E. Hedge
1969, American Journal of Science (267) 598-608
No abstract available....
Charles M. Taylor, Arthur S. Radtke
1969, Economic Geology (64) 306-318
Detailed mineralogical and chemical study of sphalerite-rich lead ores from Flat River, Mo., confirms the presence of anomalous amounts of silver in the sphalerite. Although silver is closely associated with chlorine and no silver sulfide minerals were identified, geochemical considerations indicate the silver may be...
T.T. Chao
1969, Economic Geology (64) 287-290
A method has been developed whereby nanogram amounts of gold in waters can be accurately determined. The development of the method involves determination of optimum conditions for the complete recovery of gold from water using an anion exchange resin column, quantitative elution of gold from the resin, and final measurement...
Willamette Basin Task Force
1969, Report, Willamette Basin comprehensive study of water and related land resources
The study was undertaken to plan for the proper development of water andrelated land resources of the Willamette Basin in Oregon. Appendix B, along with Appendices A and C, provides supporting data for the functional Appendices D through L. Climate is first discussed, including the climatic significance of geographical features such as the...
Charles Anderson
1969, Economic Geology (64) 129-146
Massive sulfide deposits, consisting of pyrite and/or pyrrhotite and various ratios of chalcopyrite, sphalerite, and galena, are commonly associated with volcanic rocks that accumulated in eugeosynclines. Later deformation may leave an imprint of regional metamorphism. Two-thirds of the deposits mentioned in this review are about equally divided between silicic and...
H.C. Granger, C. G. Warren
1969, Economic Geology (64) 160-171
Anomalous concentrations of iron sulfides found at roll fronts are believed to result from limited oxidation and mobilization of reduced sulfur species from earlier formed pyrite within the more extensively oxidized core of the roll. Laboratory experiments and chemical theory suggest that the reactions need not be biogenic, and that...
Marvin J. Fishman, B.P. Robinson
1969, Analytical Chemistry (41) 323-360
No abstract available....
Lawrence J. Blus, D.A. Johnson
1969, American Midland Naturalist (81) 583-584
A nursing female short-tailed shrew (Blarina brevicauda) adopted a nestling house mouse (Mus musculus). The mouse was observed in the nest with the female and her litter of shrews three days after it was introduced into the aluminum box containing the shrews,...
James Gilluly
1969, Economic Geology (64) 228-228
No abstract available....
W. J. Moore, Marvin A. Lanphere, J.D. Obradovich
1969, Economic Geology (64) 229-229
No abstract available....
Robert Schoen
1969, Geological Society of America Bulletin (80) 643-650
Sulfuric acid forms near sulfurous hot springs as the result of oxidation of hydrogen sulfide exhalations by atmospheric oxygen. This strong acid rapidly alters the surrounding rocks and can destroy man-made structures and contaminate streams. Four tracts of acid-altered ground in Yellowstone National Park were studied in order to determine...
C. L. McGuinness
1969, Groundwater (7) 7-10
Four principal trends in ground water are apparent:(1) Increasing use of ground water for domestic supplies. Geohydrologists must learn to quantitatively evaluate the supply under conditions of maximum development, not merely determine the availability of a supply that does not strain the aquifer. (2) Aquifers will be looked to increasingly...
Carl E. Hedge, Roy J. Knight
1969, Geochemical Journal (3) 15-24
Isotopic compositions of lead and strontium and concentrations of lead, uranium, thorium, rubidium, and strontium were measured in a suite of volcanic rocks, ranging from basalt to rhyodacite in composition, and in granite and gabbro xenoliths from a traverse across northern Honshu. The observed 238U/204Pb (μ) ratio ranges from 2.4 in...
William G. Ayrton, William B. N. Berry, Arthur J. Boucot, Jean Lajoie, Pierre J. Lespérance, Louis Pavlides, W. Brian Skidmore
1969, Geological Society of America Bulletin (80) 459-483
Rocks of clearly dated early Llandovery age, as well as rocks that can logically be classed as early Llandovery from their regional relationships, appear to be more widespread than recognized, heretofore, in the northern Appalachians and adjacent regions. Their areal distribution and lithology permit a generalized reconstruction of the paleogeography,...
William Thomas Pecora
1969, Professional Geographer (21) 73-78
No abstract available....
Arthur H. Lachenbruch, B. Vaughn Marshall
1969, Arctic (22) 300-311
Defines heat flow as the flux at the earth's solid surface of heat conducted from the interior; the heat-flow-unit (hfu) is on the order of 1-millionth calorie through each sq cm of the surface/sec, which is enough to melt a 4-mm layer of ice over the earth's surface/yr. Earth heat...
L.J. Patrick Muffler, Donald H. White
1969, Geological Society of America Bulletin (80) 157-181
The Salton Sea geothermal system is entirely within Pliocene and Quaternary sediments of the Colorado River delta at the north end of the Gulf of California. At the time of deposition, these sediments consisted of sands, silts, and clays of uniform original mineralogic composition, but under the elevated temperatures and...
Glen R. Himmelberg, James J. Papike
1969, Journal of Petrology (10) 102-114
Four pairs of associated calcic and sodic amphiboles from blueschist facies metamorphic rocks were analyzed with the electron microprobe and studied by single-crystal X-ray diffraction techniques. Except for ranges in the ratios Mg/(Mg+Fe) and Fe3+/(Fe3++Al+Ti), the sodic amphiboles are similar in chemical composition. The amount of calcium in the M(4)-site...