George A. Desborough, C.L. Sainsbury
1970, Economic Geology (65) 1004-1006
No abstract available....
Search Results
164439 results.
Alternate formats: RIS file of the first 3000 search results | Download all results as CSV | TSV | Excel | RSS feed based on this search | JSON version of this page of results
Page 5731, results 143251 - 143275
Publication Extents
Not all publications have extents, not all extents are completely accurateS. S. Goldich, C. E. Hedge, T. W. Stern
1970, Bulletin of the Geological Society of America (81) 3671-3695
Granitic gneisses in the vicinities of Morton and Montevideo in the Minnesota River Valley are dated at 3550 m.y. ago and are the oldest rocks so far found in North America. The gneisses were altered in varying degree by younger events of which two have been dated at 2650 m.y....
George F. Smoot
1970, Eos, Transactions, American Geophysical Union (51) 884-884
Approximately 520 engineers and scientists from 55 countries attended the International Symposium on Hydrometry held at Koblenz, Federal Republic of Germany, from September 13 through 22, 1970. The symposium was convened by Unesco and organized in cooperation with the World Meteorological Organizations (WMO), Unesco, the National Committee for the International...
L. Peselnick
1970, Journal of the Acoustical Society of America (48) 1324-1327
An ultrasonic method for determining velocity has been developed that is independent of phase‐change errors due to reflection of specimen waves from coupling films. The method also eliminates the possibility of error due to conditions of nonhydrostatic stress at a specimen‐transducer or specimen‐delay line interface. Preliminary data are given for Alcoa 2024‐T4 aluminum and...
Donald C. Ross
1970, Bulletin of the Geological Society of America (81) 3647-3661
Large-scale lateral movement on the San Andreas fault zone is suggested by the distribution of gabbroic rocks that may be slivered remnants of oceanic crust. Distinctive and unusual hornblende quartz gabbro and anorthositic gabbro that are virtually identical both petrographically and chemically are exposed at Logan and Gold Hill in...
David W. Scholl, H. Gary Greene, Michael S. Marlow
1970, Bulletin of the Geological Society of America (81) 3583-3591
In 1948, several specimens identified as the plant genus Annularia, a primitive horsetail of Pennsylvanian or Permian age, were found in tuffaceous sandstone exposed near the northern end of Adak Island, Alaska. These beds form the basal part of the Andrew Lake Formation, a newly named sequence of marine sedimentary...
Michael Churkin Jr., Claire Carter, George Donald Eberlein
1970, Journal of the Geological Society (126) 319-330
The first discovery in North America of a succession of graptolite faunas across the Ordovician–Silurian boundary has been made on Esquibel Island, in south-eastern Alaska, where five graptolite zones are represented in an 18 m interval of shale in the Descon Formation. Despite the thinness of...
E. W. Tooker
1970, Bulletin of the Geological Society of America (81) 3503-3506
No abstract available....
R. P. Fischer
1970, Economic Geology (65) 778-784
Uranium deposits of the Wyoming roll type and the Colorado Plateau peneconcordant type are the principal domestic resources of uranium. Both types occur in lenticular sandstone beds of continental origin, have a similar suite of elements and minerals, are associated with mildly altered rock, and...
E.N. Harshman, Kenneth G. Bell
1970, Economic Geology (65) 849-855
Deposits that contain uraninite and sulfide minerals at Heaths Peak, Carbon County, Wyo., display a zoned distribution of metals from the edge of granite into adjacent metamorphic rocks. The metallic minerals -- uraninite, molybdenite, pyrite, chalcopyrite, galena, pyrrhotite, and marcasite -- are concentrated on the...
C. W. Naeser, Edwin H. McKee
1970, Bulletin of the Geological Society of America (81) 3375-3383
Ages obtained from three Tertiary ash-flow tuffs in central Nevada by fission-track and K-Ar dating are concordant. Samples dated by these methods from the same localities give the same age within the limits of analytical uncertainty. Samples of three units from widely separated localities were dated further to confirm the...
Robert E. Zartman, Patrick M. Hurley, Harold W. Krueger, Bruno J. Giletti
1970, Bulletin of the Geological Society of America (81) 3359-3373
Approximately 200 K-Ar mineral and whole rock ages from New England, half of which are previously unpublished, are used to delineate an area of Permian thermal disturbance. The disturbed area, as outlined by K-Ar mica ages, forms a north-northeast-trending belt 60–80 mi wide that extends...
Joseph E. Hazel Jr.
1970, Bulletin of the Geological Society of America (81) 3237-3252
The large data arrays common in biostratigraphy make subjective groupings difficult. Because of this, biostratigraphers have commonly based conclusions on the occurrences of relatively few species. The use of binary similarity coefficients, cluster analysis techniques, and digital computers allows a polythetic approach to biostratigraphy. The...
Richard F. Marvin, H. H. Mehnert, D. C. Noble
1970, Bulletin of the Geological Society of America (81) 3385-3391
The Ar36 content of densely welded glasses from ash-flow units provides a means by which the amount of air entrapped and subsequently resorbed by the glasses during compaction and welding may be calculated. The amount of air measured in glasses from nine upper Tertiary ash-flow sheets...
J. H. Feth
1970, Water Resources Research (6) 1454-1457
Saline water is arbitrarily defined as water containing more than 1000 milligrams per liter of dissolved solids. Saline ground water is known to underlie about two‐thirds of the 48 states. Locally, aquifers yield saline ground water in profuse quantities, some of which is used by industry, particularly for cooling. Generally,...
D.A. Murphy, L.J. Korschgen
1970, Journal of Wildlife Management (34) 887-903
Feeding tests were conducted from January, 1966, to January, 1969, to ascertain the effects of daily ingestions of sublethal amounts of dieldrin on white-tailed deer (Odocoileus virginianus). Groups of deer on 0 ppm dieldrin (controls), 5 ppm, and 25 ppm dieldrin were maintained at these respective levels, as were their...
K.C. Sadler, R. E. Tomlinson, H. M. Wight
1970, Journal of Wildlife Management (34) 783-788
The examination of 7,892 adult doves in Missouri between 1953 and 1965 showed that less than 2.5% of adult doves completed their molt before October 1. Adult doves of both sexes began molting their primary feathers during early June in Missouri and lost the last (tenth) primary during the latter...
W.B. Krohn
1970, Journal of Wildlife Management (34) 769-775
In 1968 and 1969, 60 American woodcock (Philohela minor) were collected before and after alighting on summer fields in central Maine. A comparison of stomach contents from these birds showed that woodcock fed prior to entering fields at dusk. No evidence was found to indicate that any substantial amount of...
Charles J. Henny, W.S. Overton, H. M. Wight
1970, Journal of Wildlife Management (34) 690-703
A method for calculating parameters necessary to maintain stable populations is described and the management implications of the method are discussed. This method depends upon knowledge of the population mortality rate schedule, the age at which the species reaches maturity, and recruitment rates or age ratios in the population....
Robert E. Wallace
1970, Bulletin of the Geological Society of America (81) 2875-2889
Possible recurrence intervals between earth- quakes of different magnitude that may be generated along the San Andreas fault are derived by relating long-term offset rates since mid-Tertiary time, displacements, and lengths of breaks recorded for historic earthquakes, and tectonic creep rates.The recurrence interval for earthquakes of different magnitude at a...
U.S. Bureau of Sport Fisheries and Wildlife
1970, Wildlife Leaflet 493
No abstract available....
Richard C. Culler
1970, Eos, Transactions, American Geophysical Union (51) 684-689
Evapotranspiration from the flood plain of a major river depletes the water contributed from upstream areas of the watershed. This depletion can be significant in arid regions where water supplies are inadequate. Phreatophyte control offers a method of reducing the evapotranspiration and thus increases the water available...
Norman G. Banks
1970, Bulletin of the Geological Society of America (81) 3033-3048
Two generations of chert have been observed in the Mississippian Leadville Limestone of west-central Colorado: (1) an early chert inferred to have precipitated from hypersaline marine waters of high pH after those waters seeped into carbonate muds prior to final burial and lithification of the carbonate; and (2) a late...
Richard A. Schoettger, E.W. Steucke Jr.
1970, Progressive Fish-Culturist (32) 199-201
No abstract available. ...
G. L. Hoffman
1970, Journal of Wildlife Diseases (6) 262-265
All trematodes which cause infections and diseases in humans (zoonoses) require snails for their first intermediate host. Some have additional intermediate hosts such as crustaceans, fishes and frogs.In this paper I have discussed the use of various procedures for controlling snail populations thereby reducing the population of trematodes whose cercariae...