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Page 5445, results 136101 - 136125

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Flood hazards in the Seattle-Tacoma urban complex and adjacent areas, Washington
B. L. Foxworthy, E.G. Nassar
1975, Report
Floods are natural hazards that have complicated man's land-use planning for as long as we have had a history. Although flood hzards are a continuing danger, the year-to-year threat cannot be accurately predicted. Also, on any one stream, the time since the last destructive flood might be so long that...
Potentiometric surface of the Lloyd aquifer on Long Island, New York, in January 1975
Charles A. Rich, Keith R. Prince, Anthony G. Spinello
1975, Report
A map showing the potentiometric surface of the Lloyd aquifer was drawn from water-level measurements made in January 1975. Altitude of the potentiometric surface ranged from more than 20 feet below mean sea level in Queens County to more than 40 feet above mean sea level in Suffolk County....
Recent sedimentary history of Lake Monona, Wisconsin
Gilbert C. Bortleson, G.F. Lee
1975, Water, Air, & Soil Pollution (4) 89-98
Chemical analyses from two short cores in Lake Monona show that pronounced changes in chemical stratigraphy have occurred since white man moved into Madison and southern Wisconsin and began modifying the area. Since the mid to late 1800's, there has been an appreciable increase in P,...
The orthoenstatite to clinoenstatite transformation by shearing and reversion by annealing: Mechanism and potential applications
R. S. Coe, Stephen H. Kirby
1975, Contributions to Mineralogy and Petrology (52) 29-55
Clinoenstatite (CE) was produced by deforming single-crystal specimens of ortho-enstatite (OE) in several different sorta of experiments. Examination with light and trans-mission electron microscopes shows that the transformation is coherent and involves a macroscopic shear on (100) [001] through an angle of 12.8±1.3 °, in good...
Geologic setting of Boulder 1, Station 2, Apollo 17 landing site
E.W. Wolfe
1975, The Moon (14) 307-314
Boulder 1 at Station 2 is one of three boulders sampled by Apollo 17 at the base of the South Massif, which rises 2.3 km above the floor of a linear valley interpreted as a graben formed by deformation related to the southern Serenitatis impact. The...
U-Th-Pb systematics of selected samples from Apollo 17, Boulder 1, Station 2
P.D. Nunes, M. Tatsumoto
1975, The Moon (14) 463-471
Nine U-Th-Pb whole-rock analyses of selected brecciated materials from sample 72215 and one analysis of a pigeonite basalt clast from 72275 are presented. Both samples are from Boulder 1, Apollo 17. These data supplement previous Boulder 1 U-Th-Pb analyses of samples 72275 and 72255. U and Th concentrations indicate that...
Origin of magnetite and pyrrhotite in carbonaceous chondrites
J.M. Herndon, M.W. Rowe, E.E. Larson, D.E. Watson
1975, Nature (253) 516-518
CARBONACEOUS chondrites, although comprising only about 2% of known meteorites, are extremely interesting for scientific investigation. Their mineral constitution, and the correspondence between their bulk chemical composition and the solar abundance of condensable elements, indicate that minimum chemical fractionation and thermal alteration have occurred. The mineral...
Analysis of the rate of wildcat drilling and deposit discovery
L.J. Drew
1975, Journal of the International Association for Mathematical Geology (7) 395-414
The rate at which petroleum deposits were discovered during a 16-yr period (1957–72) was examined in relation to changes in a suite of economic and physical variables. The study area encompasses 11,000 mi2 and is located on the eastern flank of the Powder River Basin. A two-stage...
Ages of fossil bones from British interglacial sites
Barney J. Szabo, D. Collins
1975, Nature (254) 680-682
THE time gap between the upper limit of radiocarbon dating (≈60,000 yr BP) and the lower limit of dates generally obtainable using the K–Ar method (≈250,000 yr BP) accounts for the scarcity of dates for the last two interglaciations (the Ipswichian and Hoxnian of Britain; the...
Oats may grow better in water depleted in oxygen 18 and deuterium
Jim D. Gleason, Irving Friedman
1975, Nature (256) 305
WHILE growing oats at different temperatures in water of different 18O and deuterium (D) abundances, we noticed that oats grown in Antarctic water in which is depleted in 18O and D by −49‰ and −400‰, relative to standard mean ocean water (SMOW used as a comparative reference in...
Anomalous delays of teleseismic P waves in Yellowstone National Park
H. M. Iyer
1975, Nature (253) 425-427
TELESEISMIC P waves recorded by a short-period seismic network, comprising 12 stations, in Yellowstone National Park, show anomalous delays of 1–2 s in their travel times in the central region of the park relative to the surrounding area. To explain this phenomenon, I propose that a...
Two models for earthquake forerunners
V.I. Mjachkin, W.F. Brace, G.A. Sobolev, James H. Dieterich
1975, Pure and Applied Geophysics PAGEOPH (113) 169-181
Similar precursory phenomena have been observed before earthquakes in the United States, the Soviet Union, Japan, and China. Two quite different physical models are used to explain these phenomena. According to a model developed by US seismologists, the so-called dilatancy diffusion model,...
Lead isotope relations in oceanic Ridge basalts from the Juan de Fuca-Gorda Ridge area N.E. Pacific Ocean
S. E. Church, M. Tatsumoto
1975, Contributions to Mineralogy and Petrology (53) 253-279
Lead isotopic analyses of a suite of basaltic rocks from the Juan de Fuca-Gorda Ridge and nearby seamounts confirm an isotopically heterogeneous mantle known since 1966. The process of mixing during partial melting of a heterogeneous mantle necessarily produces linear data arrays that can be interpreted...
Compositional evidence regarding the influx of interplanetary materials onto the lunar surface
J. T. Wasson, W. V. Boynton, C. L. Chou, Philip A. Baedecker
1975, The Moon (13) 121-141
Siderophilic element/Ir ratios are higher in mature lunar soils from highlands sites than in those from mare sites. We infer that the population of materials responsible for the early intense bombardment of the Moon had high ratios, and that the population responsible for the essentially constant flux has low ratios....
The nature of surface tilt along 85 km of the San Andreas fault-preliminary results form a 14-instrument array
C.E. Mortensen, M.J.S. Johnston
1975, Pure and Applied Geophysics PAGEOPH (113) 237-249
The continuous monitoring of surface deformation near active faults is clearly necessary for an understanding of elastic strain accumulation and elastic and anelastic strain release associated with earthquakes. Fourteen 2-component tiltmeters have been installed in shallow boreholes along 85 km of the currently most active section...