California earthquakes: Why only shallow focus?
W.F. Brace, J.D. Byerlee
1970, Science (168) 1573-1575
Frictional sliding on sawcuts and faults in laboratory samples of granite and gabbro is markedly temperature-dependent. At pressures from 1 to 5 kilobars, stick-slip gave way to stable sliding as temperature was increased from 200 to 500 degrees Celsius. Increased temperature with depth could thus cause the abrupt disappearance of...
Identification of polychlorinated biphenyls in two bald eagles by combined gas-liquid chromatography-mass spectrometry
George E. Bagley, W. L. Reichel, E. Cromartie
1970, Journal of the Association of Official Analytical Chemists (53) 251-261
Polychlorinated biphenyls are widely used industrial compounds marketed in the United States under the trade name Aroclor. They have appeared in fish and wildlife tissues in this country and Europe. They are known to be toxic, but more importantly, their presence in samples along with the commonly occurring organochlorine pesticides...
Aspects of oil and gas operations on federal and Indian lands of interest to engineers
Charles J. Curtis
1970, Conference Paper, SPE Rocky Mountain regional meeting
It is always enjoyable to attend any meeting of the Society of Petroleum Engineers. I am happy to have this opportunity to speak to you because I believe that petroleum engineers can benefit from a better understanding of the Mineral Leasing Act and the regulations that implement the act insofar...
Jupiter: His limb darkening and the magnitude of his internal energy source
L.M. Trafton, R.L. Wildey
1970, Science (168) 1214-1215
The most accurate infrared photometric observations (8 to 14 microns) to date of the average limb darkening of Jupiter have been combined with the most refined deduction of jovian model atmospheres in which flux constancy has been closely maintained in the upper regime of radiative equilibrium and a much more...
Late Mesozoic-Cenozoic tectonic aspects of the Atlantic Coastal margin
Thomas G. Gibson
1970, Bulletin of the Geological Society of America (81) 1813-1822
Data from the middle and northern Atlantic Coastal Plain of the United States and continental slope show that the dominant filling of the Atlantic margin geosyncline occurred in pre-latest Cretaceous time with only thin additions of Cenozoic strata. The influx of significant amounts of detrital material into the offshore areas...
Geophysical studies of the Cripple Creek mining district, Colorado
M. Dean Kleinkopf, Donald L. Peterson, Garland B. Gott
1970, Geophysics (35) 490-500
Integrated geophysical, geochemical, and geological interpretations expand the knowledge about the localization of the ore deposits in the Cripple Creek district, Colorado. The principal gold deposits occur in a Tertiary volcanic subsidence basin within Precambrian granite, gneiss, and schist. The basin is filled with volcanic...
Fossiliferous boulders in the Woods Hollow Shale, Marathon region, Texas: Discussion
Philip B. King
1970, Bulletin of the Geological Society of America (81) 1843-1845
No abstract available....
Comparison of chemical hydrogeology of the carbonate peninsulas of Florida and Yucatan
W. Back, B.B. Hanshaw
1970, Journal of Hydrology (10) 330-368
Aquifers of the peninsulas of Florida and northern Yucatan are Tertiary marine carbonate formations showing many lithologic and faunal similarities. In addition, the tropical to subtropical climates of the two areas are similar, each having annual rainfall of about 1000 to 1500 mm.Despite similarities in these fundamental controls, contrasts in...
Metamorphic waters from the Pacific tectonic belt of the west coast of the United States
I. Barnes
1970, Science (168) 973-975
Waters unusually rich in ammonia, boron, carbon dioxide, hydrogen sulfide, and hydrocarbons are found in more than 100 localities along the Pacific coast of the United States. The waters are believed to be products of low-grade metamorphism of marine sediments. The marine sedimentary rocks would have to be tectonically emplaced...
Tektite 1, man-in-the-sea project: Marine Science Program
H.E. Clifton, C.V.W. Mahnken, J. C. Van Derwalker, R.A. Waller
1970, Science (168) 659-663
The Tektite experiment was designed to provide data for a number of behavioral, biomedical, and engineering studies in addition to the marine sciences program. Conditions for some of these studies were not altogether compatible with the program for the marine sciences. For example, isolation imposed by human behavioral studies precluded...
Some hydrologic & biologic aspects of the Big Cypress Swamp drainage area, southern Florida 1970
H. Klein, W.J. Schneider, B. F. McPherson, T.J. Buchanan
1970, Open-File Report FL 70-003
No abstract available....
New evidence for a Pliocene marine embayment along the lower Colorado River area, California and Arizona
Patsy Beckstead Smith
1970, Bulletin of the Geological Society of America (81) 1411-1420
Marine foraminiferal, marine to fresh-water molluscan, and brackish- to fresh-water ostracode faunas occur in a thick section of limestone, silt, and clay of the Bouse Formation along the Colorado River from Parker to Yuma in an area now isolated from the sea. Faunas in the Parker-Blythe-Cibola area are limited in...
Availability of ground water in the Gallup-Tohatchi area, McKinley County, New Mexico
Jerry W. Mercer, James Blair Cooper
1970, Report
No abstract available....
Premetamorphic down-to-basin faulting, folding, and tectonic dewatering, Rangeley area, western Maine
Robert H. Moench
1970, Bulletin of the Geological Society of America (81) 1463-1496
The Rangeley area of western Maine is underlain by a thick sequence of dominantly eugeosynclinal metasedimentary rocks of Ordovician, Silurian, and Devonian age. The dominant structural pattern of these rocks is defined by tight, upright, northeast-trending passive flow folds and by three major normal faults along which younger rocks on...
Peru-Chile Trench sediments and sea-floor spreading
David W. Scholl, Mark N. Christensen, Roland E. von Huene, Michael S. Marlow
1970, Bulletin of the Geological Society of America (81) 1339-1360
The hypotheses of sea-floor spreading and plate tectonics require the removal of sediment from oceanic trenches either by crustal underthrusting or by folding against the base of a continental or insular margin. Accordingly, over a period of time the volume of sediment removed by way of spreading must be equal...
Macusanite occurrence, age, and composition, Macusani, Peru
Virgil E. Barnes, George Edwards, W. A. McLaughlin, Irving Friedman, Oiva Joensuu
1970, Bulletin of the Geological Society of America (81) 1539-1546
Macusanite, originally believed to be a type of tektite because of its sculpture, is shown to be related to sillar of the Macusani region, Peru. K-Ar measurements establish identical Pliocene ages (4.2 m.y.) for macusanite and sillar and relate these deposits to the extensive ash...
Silver depletion indicated by microanalysis of gold from placer occurrences, western United States
George A. Desborough
1970, Economic Geology (65) 304-311
No abstract available....
Geochemistry of black shale deposits— A summary report
James D. Vine, Elizabeth B. Tourtelot
1970, Economic Geology (65) 253-272
No abstract available....
Role of gravity, temperature gradients, and ion exchange media in the formation of fossil brines
P. C. Mangelsdorf Jr., Frank T. Manheim, J. M. Gieskes
1970, American Association of Petroleum Geologists Bulletin (54) 617-626
Calculations show that gravitational settling of ions in an isothermal sediment column could produce increases of equilibrium concentrations in pore waters ranging from 1 percent per 100 m depth for chloride to 4 percent per 100 m depth for strontium.The migration of ions in a thermal gradient (Soret effect) would...
Arsenic in detergents: Possible danger and pollution hazard
E.E. Angino, L.M. Magnuson, T.C. Waugh, O.K. Galle, J. Bredfeldt
1970, Science (168) 389-390
Arsenic at a concentration of 10 to 70 parts per million has been detected in several common presoaks and household detergents. Arsenic values of 2 to 8 parts per billion have been measured in the Kansas River. These concentrations are close to the amount (10 parts per billion) recommended by...
Geological significance of coccoliths in fine-grained carbonate bands of postglacial Black Sea sediments
David Bukry, Stanley A. King, Michael K. Horn, Frank T. Manheim
1970, Nature (226) 156-158
The origin of fine carbonate muds in deep parts of the Black Sea has been explained in various ways, but details of how the carbonate was formed are poorly understood. We have studied samples containing fine carbonate from cores obtained during the cruise of Atlantis II (Woods Hole Oceanographic Institute)...
Missile impacts as sources of seismic energy on the moon
G.V. Latham, W.G. McDonald, H. J. Moore
1970, Science (168) 242-245
Seismic signals recorded from impacts of missiles at the White Sands Missile Range are radically different from the signal recorded from the Apollo 12 lunar module impact. This implies that lunar structure to depths of at least 10 to 20 kilometers is quite different from the typical structure of the...
Age determination of raccoons
G.A. Grau, G.C. Sanderson, J.P. Rogers
1970, Journal of Wildlife Management (34) 364-372
Age criteria, based on 61 skulls and eye lenses from 103 known-age captives, are described for separating raccoons (Procyon lotor) into eight age-classes as follows: young-of-the-year, 1, 2, 3, 4, 5, 6-7, > 7 years. Criteria studied were eye lens nitrogen, cranial suture closure, tooth wear and incisor cementum layers....
Interstitial water studies on small core samples, Deep Sea Drilling Project, Leg 3
F.T. Manheim, K.M. Chan, D. Kerr, W. Sunda
1970, Initial reports of the Deep Sea Drilling Project (3) 663-666
Eleven samples of fluids which had been squeezed on board ship, and four, packaged sediment samples were received in our laboratories. As in Leg 2, the volumes of fluid available were scanty and did not permit multiple determinations of constituents in many of the samples; in Hole 21 the fluid...
Faulting in the Burro Mountain area, California Coast Ranges, and its relation to the Nacimiento fault
Robert Ahlberg Loney
1970, Bulletin of the Geological Society of America (81) 1249-1254
The northwest-striking Nacimiento fault, in the southern Coast Ranges of California, has generally been regarded as the boundary between two major structural blocks: the Nacimiento block to the southwest, in which the basement rocks belong to the Franciscan Formation (Upper Jurassic to Upper Cretaceous), and...
