Eocene age of the Adak ‘Paleozoic (?)’ rocks, Aleutian Islands, Alaska
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...
Graptolite succession across the Ordovician–Silurian boundary in south-eastern Alaska
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...
Radial movements in the western Wyoming salient of the Cordilleran overthrust belt: Discussion
E. W. Tooker
1970, Bulletin of the Geological Society of America (81) 3503-3506
No abstract available....
Similarities, differences, and some genetic problems of the Wyoming and Colorado plateau types of uranium deposits in sandstone
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...
Uraninite-bearing contact metamorphic deposits, Heaths Peak, Carbon County, Wyoming
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...
Fission-track and K-Ar ages of Tertiary ash-flow tuffs, north-central Nevada
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...
A Permian disturbance of K-Ar radiometric ages in New England: Its occurrence and cause
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...
Binary coefficients and clustering in biostratigraphy
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...
Use of Ar36 to Evaluate the Incorporation of Air by Ash Flows
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...
Saline groundwater resources of the conterminous United States
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,...
Woodcock feeding habits as related to summer field usage in central Maine
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...
Reproduction, growth, and tissue residues of deer fed dieldrin
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...
Progress of primary feather molt of adult mourning doves in Missouri
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...
Determining parameters for populations by using structural models
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....
Earthquake recurrence intervals on the San Andreas fault
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...
Fur catch in the United States, 1969
U.S. Bureau of Sport Fisheries and Wildlife
1970, Wildlife Leaflet 493
No abstract available....
A progress report: Water conservation by removal of phreatophytes
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...
Nature and origin of early and late cherts in the Leadville Limestone, Colorado
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...
Quinaldine and MS-222 as spawning aids for northern pike, muskellunge, and walleyes
Richard A. Schoettger, E.W. Steucke Jr.
1970, Progressive Fish-Culturist (32) 199-201
No abstract available. ...
Control methods for snail-borne zoonoses
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...
Eastern margin of the Red Sea and the coastal structures in Saudi Arabia
Glen F. Brown
1970, Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences (267) 75-87
Results of many investigations since 1950 show that the eastern margin of the Red Sea and associated coastal structures in Saudi Arabia have a long geologic history, starting with the deposition of Precambrian eugeosynclinal sedimentary and volcanic rocks before 1000 Ma ago and extending to recent geologic time. The northeastern...
Deuterium: Natural variations used as a biological tracer
J.D. Gleason, I. Friedman
1970, Science (169) 1085-1086
The suggestion is made that isotope tracing be carried out by monitoring the natural variations in deuterium concentrations. As an example, the natural variations in deuterium concentrations between food and water collected in Illinois and food and water collected in Colorado were used to determine the residence time of water...
Seismic refraction study of crustal structure in the western United States
Claus Prodehl
1970, Bulletin of the Geological Society of America (81) 2629-2645
A network of 64 seismic-refraction profiles recorded by the U.S. Geological Survey in California and Nevada and adjacent areas of Idaho, Wyoming, Utah, and Arizona from 1961 to 1963 was re-interpreted. From record sections compiled for all profiles, a basic travel-time diagram can be derived. In addition to the first...
The Uralides and the motion of the Russian and Siberian Platforms
Warren B. Hamilton
1970, Bulletin of the Geological Society of America (81) 2553-2576
The Uralides—the late Precambrian and Paleozoic orogenic terrane between the Russian and Siberian Platforms—in part are exposed in the Ural Mountains, in the central Soviet Arctic, along the west edge of the Siberian Platform, and in southern Siberia and Kazakhstan, and in part are buried beneath the fill of the...
Big game inventory for 1969
U.S. Division Of Wildlife Research
1970, Wildlife Leaflet 492
No abstract available....
