Archaeocycas and Phasmatocycas - new genera of Permian cycads
Sergius H. Mamay
1973, Journal of Research of the U.S. Geological Survey (1) 687-689
The generic names Archaeocycas and Phasmatocycas are introduced for two previously announced but unnamed new genera of Early Permian plants; these taxa are regarded as early stages in the cycadean lineage. The names arc formalized with diagnoses, illustrations, and type designations....
Sr87/Sr86, K, Na, Rb, and Sr in some eclogites and associated basalts from California and southwestern Oregon
E. D. Ghent, Z. E. Peterman, R. G. Coleman
1973, Journal of Research of the U.S. Geological Survey (1) 643-647
Six samples of group C eclogites from California and southwestern Oregon have initial Sr87/Sr86 ratios in the range of 0.7028 to 0.7051; Rb contents from less than 1 to 53.4 ppm; and Sr contents from 147 to 270 ppm. These data and major-element compositions suggest that the eclogites were derived from basalts older than but...
Effects of migratory waterfowl on water quality at the Montezuma National Wildlife Refuge, Seneca County, New York
Mark A. Have
1973, Journal of Research of the U.S. Geological Survey (1) 725-734
This study was done in response to the shellfish industry's concern that bacteria in effluent from the national wildlife refuges along the northeast coast of the United States may be adversely affecting the harvest of shellfish. A line graph shows inconsistent relationships between bird population at the Montezuma refuge and total coliform, fecal coliform, and...
Atomic absorption spectrophotometric determination of microgram levels of Co, Ni, Cu, Pb, and Zn in soil and sediment extracts containing large amounts of Mn and Fe
T. T. Chao, R. F. Sanzolone
1973, Journal of Research of the U.S. Geological Survey (1) 681-685
An atomic absorption spectrophotometric method has been developed for the determination of seven metal ions in the hydroxylamine extract of soils and sediments. Mn, Fe, and Zn are directly determined in the aqueous extract upon dilution. Co, Ni, Cu, and Pb in a separate aliquot of the extract are chelated with APDC (ammonium pyrrolidine dithiocarbamate)...
An accurate Invar-wire extensometer
W. A. Duffield, Robert O. Burford
1973, Journal of Research of the U.S. Geological Survey (1) 569-577
Stevens Type F water-level recorders have been modified to measure changes in the distance between two points, with amplification of up to 10 times. Such recorders are capable of measuring strains of 10-5 and possibly 10-6 over 10-m distances when corrections are made for frictional effects and temperature. In two...
Summer behavior of immature radio-equipped woodcock in central Maine
R.D. Dunford, Ray B. Owen
1973, Journal of Wildlife Management (37) 462-469
The behavior of 15 immature American woodcock (Philohela minor) was studied in central Maine during the summers of 1969 and 1970 using radiotelemetry. The monitored birds used a variety of nocturnal sites including old fields, bogs, powerlines, highway medians, woods roads, and fore clearings. Old fields were occupied more often...
Land use and prairie grouse population relationships in North Dakota
L.M. Kirsch, A.T. Klett, H.W. Miller
1973, Journal of Wildlife Management (37) 449-453
The relationship between prairie grouse and land use was studied during the period 1964-71. Prairie chickens (Tympanuchus cupido) declined from 48 males in 1964 to none in 1971. Sharp-tailed grouse (Pedioecetes phasianellus) declined from 166 males in 1964 to 57 in 1971. These declines were related to the decline in...
Karst hydrology: A review
H. E. LeGrand, V. T. Stringfield
1973, Journal of Hydrology (20) 97-120
Karst regions of the world are characterized by limestones and other soluble rocks at or near land surface that have been modified by solutional erosion. Such surface features as sinks, long dry valleys, sparse streams, and bare rock and such subsurface features as caverns, arterial solution openings leading to large...
Ophiolites in the earth's crust: A symposium, field excursions, and cultural exchange in the USSR
Robert G. Coleman
1973, Geology (1) 51-54
No abstract available....
Water projects design with inadequate data: Madrid, Spain June 4-9, 1973
I. C. James II
1973, Eos, Transactions, American Geophysical Union (54) 935-937
The Symposium on the Design of Water Resources Projects with Inadequate Data drew 300 participants, representing more than 60 countries. The symposium was planned within the framework of the International Hydrological Decade and was convened by Unesco and WMO. Organization of the symposium was carried out by Unesco and the...
Fusion Relations in the System NaAlSi3O8-CaAl2Si2O8-KAlSi3O8-SiO2-H2O and Generation of Granitic Magmas in the Sierra Nevada Batholith
Dean C. Presnall, P. C. Bateman
1973, Geological Society of America Bulletin (84) 3181-3201
Chemical analyses of 167 typical specimens indicate that about 95 percent of the intrusive rocks of the central Sierra Nevada contain more than 79 percent normative Ab + An + Or + Qz. If the composition of the lower continental crust is similar to or slightly more felsic than andesite,...
Potassium-argon ages of lavas from the Hawi and Pololu Volcanic Series, Kohala Volcano, Hawaii: Reply
Ian McDougall, Donald A. Swanson
1973, Geological Society of America Bulletin (84) 3485-3487
No abstract available....
Stable isotope and chemical relations during mineralization in the Bodie mining district, Mono County, California
J. R. O’Neil, M.L. Silberman, B.P. Fabbi, C. W. Chesterman
1973, Economic Geology (68) 765-784
Stable isotope and chemical relations have been determined in a typical epithermal Au-Ag deposit located in the Bodie mining district of California. Analyses were made of altered host rocks, vein minerals, alteration clays, fluid inclusions, modern spring waters, and unaltered rocks of the area.The results indicate that a hydrothermal convection...
Tragic base surge in 1790 at Kilauea Volcano
Donald A. Swanson, Robert L. Christiansen
1973, Geology (1) 83-86
Reconstruction of events surrounding the deaths of a party of Hawaiian warriors in 1790 on Kilauea Volcano suggests that they were killed by a hot, relatively ash-free base surge. Recognition of structures attributable to base-surge deposition in deposits of the 1790 eruption is consistent with this reconstruction....
Fossil forms of Amentiferae
Jack A. Wolfe
1973, Brittonia (25) 334-355
Review of the procedures used in determining fossil plant organs indicates that the many Cretaceous records of extant genera of “Amentiferae” based on leaves should be rejected as theoretically unreliable. Palynological data, in combination with some valid megafossil data, indicate that most recognizable members of “Amentiferae” are no older than...
Oxidation during magmatic differentiation, Finnmarka Complex, Oslo area, Norway: Part 2, the mafic silicates
Gerald K. Czamanske, David R. Wones
1973, Journal of Petrology (14) 349-380
Electron-microprobe analyses are presented for pyroxene, amphibole, and biotite from monzonite, granodiorite, and granite at Finnmarka, Norway. Compositional trends measured in biotite, present in all three rock types, and in amphibole, present in the monzonite and granodiorite, are markedly atypical and are interpreted as reflecting crystallization under progressively more...
Bidding and production relationships for federal OCS leases: Statistical studies of wildcat leases, Gulf of Mexico, 1962, and prior sales
John Lohrenz, Hillary A. Oden
1973, Conference Paper
The relationships between bids received on wildcat leases issued on federal OCS lands in the Gulf of Mexico from 1954 through 1962 and subsequent drilling on, production from, and relinquishment of these leases were studied. The results provided quantitative answers to questions regarding bidding as prescribed by current laws and...
Shallow structure and geologic development of the Southern Red Sea
David A. Ross, John Schlee
1973, GSA Bulletin (84) 3827-3848
A series of 34 shallow-penetration seismic-reflection profiles made across the Red Sea show that it developed in two main stages. Initially, an early or pre-Miocene uplift and lateral extension resulted in crustal thinning and eventual formation of the main Red Sea Basin. During Miocene time, the Red Sea was isolated...
Surface jet stream excess temperature analysis
Daniel P. Bauer, Louis H. Motz
1973, Report
No abstract available....
Glauconites from New Jersey-Maryland coastal plain: Their K-Ar ages and application in stratigraphic studies
James P. Owens, Norman F. Sohl
1973, Geological Society of America Bulletin (84) 2811-2838
Glauconite samples from various stratigraphic levels in the northern Atlantic Coastal Plain were dated by the K-Ar method. Twenty-eight samples were collected from glauconite-bearing sands in four traverses across the outcrop belt of Upper Cretaceous–lower Tertiary formations from northern New Jersey to eastern Maryland, thus providing a framework on which...
Regional gravity anomalies and crustal structure in northern Colombia
J. E. Case, W.D. MacDonald
1973, Geological Society of America Bulletin (84) 2905-2916
The central range of the Colombian Andes gives way northward to a series of Cenozoic fault-bordered basins and uplifts near the Caribbean Sea. Pre-Cenozoic structures exposed in the uplifts curve increasingly toward the east to become parallel to the continental margins along the south side of the Caribbean. Major Cenozoic...
Tests of rhodamine WT dye for toxicity to oysters and fish
Garald G. Parker Jr.
1973, Journal of Research of the U.S. Geological Survey (1) 499-499
Because of the toxicity to oyster larvae and eggs of rhodamine B dye in concentrations greater than 1 mg/l in earlier tests, there was a concern that rhodamine WT, a similar tracer dye, would have a detrimental effect on marine life being developed under the aquaculture program of the Lummi...
Structure and development of the continental margin of British Honduras
William P. Dillon, John G. Vedder
1973, Geological Society of America Bulletin (84) 2713-2732
The continental margin of British Honduras is characterized by elongate ridges that are sub-parallel with the coast and that diverge slightly northward. Each ridge apparently is formed by aligned fault blocks composed of continental basement rock that rotated and subsided during rifting of the margin. The western part of the...
Eclogites from southwestern Oregon
Edward D. Ghent, Robert G. Coleman
1973, Geological Society of America Bulletin (84) 2471-2488
Eclogite, high-grade blueschist, and amphibolite blocks occur within the Mesozoic Otter Point Formation of southwestern Oregon and are inferred to have been tectonically emplaced by eastward-directed overthrusting involving Colebrooke Schist and serpentinite.Eclogite from southwestern Oregon is very similar in bulk chemistry and mineralogy to the well-studied eclogite of California.Calculations of...
Biotite as a source of some of the sulfur in porphyry copper deposits
Norman G. Banks
1973, Economic Geology (68) 697-703
No abstract available....
