Obsidian hydration dating of volcanic events
I. Friedman, J. Obradovich
1981, Quaternary Research (16) 37-47
Obsidian hydration dating of volcanic events had been compared with ages of the same events determined by the 14C and K-Ar methods at several localities. The localities, ranging in age from 1200 to over 1 million yr, include Newberry Craters, Oregon; Coso Hot Springs, California; Salton Sea, California; Yellowstone National...
The terminal Eocene event and the Polish connection
J. A. Van Couvering, M.-P. Aubry, W.A. Berggren, J.P. Bujak, C. W. Naeser, T. Wieser
1981, Palaeogeography, Palaeoclimatology, Palaeoecology (36) 321-362
The Eocene/Oligocene boundary in Europe is marked by major discontinuities in all environments: the “Grande Coupure” in continental mammals; the elimination of semitropical elements from high-latitude floras; the virtually complete replacement of the shallow-marine malacofauna; and an extraordinary downslope excursion of carbonate deposition in deep-ocean basins (drop in the CCD)....
Aftershocks of the June 20, 1978, Greece earthquake: A multimode faulting sequence
David Carver, G. A. Bollinger
1981, Tectonophysics (73) 343-363
A 10-station portable seismograph network was deployed in northern Greece to study aftershocks of the magnitude (mb) 6.4 earthquake of June 20, 1978. The main shock occurred (in a graben) about 25 km northeast of the city of Thessaloniki and caused an east-west zone of surface rupturing 14 km long...
Monoclinal bending of strata over laccolithic intrusions
F.G. Koch, A. M. Johnson, D. D. Pollard
1981, Tectonophysics (74) T21-T31
Sedimentary strata on top of some laccolithic intrusions are nearly horizontal and little deformed, but are bent into steeply dipping monoclinal flexures over the peripheries of these intrusions. This form of bending is not explained by previous theories of laccolithic intrusion, which predict either horizontal undeformed strata over the center...
Gravitational potential as a source of earthquake energy
L. Barrows, C.J. Langer
1981, Tectonophysics (76) 237-255
Some degree of tectonic stress within the earth originates from gravity acting upon density structures. The work performed by this "gravitational tectonics stress" must have formerly existed as gravitational potential energy contained in the stress-causing density structure. According to the elastic rebound theory (Reid, 1910), the energy of earthquakes comes...
Contemporary doming of the Adirondack Mountains: Further evidence from releveling
Y.W. Isachsen
1981, Tectonophysics (71) 95-96
The Adirondack Mountains constitute an anomalously large, domical uplift on the Appalachian foreland. The dome has a NNE—SSW axis about 190 km long, and an east—west dimension of about 140 km. It has a structural relief of at least 1600 m, and a local topographic relief of up to 1200...
Plumbotectonics-the model
R. E. Zartman, B. R. Doe
1981, Tectonophysics (75) 135-162
Plumbotectonics is an attempt to model the geochemical behaviour of U, Th and Pb, among major terrestrial reservoirs in agreement with observational data. By recycling rock through the orogenic environment, a dynamically communicating upper crust, lower crust, and mantle can produce the required patterns of lead-isotope evolution. ...
Composition of the earth's upper mantle-I. Siderophile trace elements in ultramafic nodules
J. W. Morgan, G.A. Wandless, R.K. Petrie, A.J. Irving
1981, Tectonophysics (75) 47-67
Seven siderophile elements (Au, Ge, Ir, Ni, Pd, Os, Re) were determined by radiochemical neutron activation analysis in 19 ultramafic rocks, which are spinel lherzollites-xenoliths from North and Central America, Hawaii and Australia, and garnet Iherzolitexenoliths from Lesotho.Abundances of the platinum metals are very uniform in spinel lherzolites averaging 3.4...
Vertebrate fossil-bearing paleosol units (Willwood Formation, Lower Eocene, Northwest Wyoming, U.S.A.): Implications for taphonomy, biostratigraphy, and assemblage analysis
T. M. Bown, M. J. Kraus
1981, Palaeogeography, Palaeoclimatology, Palaeoecology (34) 31-56
In the lower 300 m of the fluvial Willwood Formation of northwest Wyoming, most large concentrations of vertebrate fossils consist of disarticulated and broken skeletal remains that occur in widespread, tubular, thin (2 cm-1 m) greenish- and bluish-gray mudstones that are low in percentage of free iron, aluminum, and manganese,...
Lower Eocene alluvial paleosols (Willwood Formation, Northwest Wyoming, U.S.A.) and their significance for paleoecology, paleoclimatology, and basin analysis
T. M. Bown, M. J. Kraus
1981, Palaeogeography, Palaeoclimatology, Palaeoecology (34) 1-30
The lower Eocene Willwood Formation of northwest Wyoming is a 700 m thick accumulation of alluvial floodplain and channel mudstones and sandstones, nearly all of which show paleopedogenic modifications. Pedogenesis of Willwood sandstones is indicated by taproot and vertebrate and invertebrate bioturbation, early local cementation by calcium carbonate, and thin...
A process-sedimentary framework for characterizing recent and ancient sabkhas
C.R. Handford
1981, Sedimentary Geology (30) 255-265
The discovery of sabkha environments during the 1960's, marked the beginning of Recent evaporite sedimentological studies and their perception as models for facies analysis. However, variation among Recent sabkhas, though recognized by the geologic community, has not been duly addressed, which has resulted in overuse of the Trucial Coast model...
Late Cenozoic marine deposition in the United States Atlantic Coastal Plain related to tectonism and global climate
B. W. Blackwelder
1981, Palaeogeography, Palaeoclimatology, Palaeoecology (34) 87-114
Major hiatuses in upper Cenozoic marine deposits in the United States Atlantic Coastal Plain are recognized on the basis of molluscan faunal changes at erosional unconformities. These hiatuses generally coincided with periods of global cooling and ice sheet formation. Such hiatuses provide information to supplement global climatic data. Major hiatuses...
Olfactory pedunculotomy induced anosmia in the wolf (Canis lupus)
E.K. Peterson, M.A. Letellier, J.A. Parsons, E.D. Plotka, L.D. Mech, U.S. Seal
1981, Physiology & Behavior (27) 543-546
A procedure for the surgical induction of anosmia in the wolf is described. Six wolves (4 altered and 2 sham) and one mongrel dog were operated; four wolves and the dog were bilaterally pedunculotomized, and two wolves were sham operated. Behavioral tests with the wolves confirmed that they were anosmic,...
Seismicity map of the state of Pennsylvania
C. W. Stover, B.G. Reagor, S. T. Algermissen
1981, Miscellaneous Field Studies Map 1280
The earthquake data shown on this map and listed in table 1 are a list of earthquakes that were originally used in preparing the Seismic Risk Studies in the United States in the United States (Algermissen, 1969) which have been recompiled and updated through 1977. These data have been reexamined...
Tonalites in crustal evolution
F. Barker, Joseph G. Arth, T. Hudson
1981, Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences (301) 293-303
Tonalites, including trondhjemite as a variety, played three roles through geological time in the generation of Earth’s crust. Before about 2.9 Ga ago they were produced largely by simple partial melting of metabasalt to give the dominant part of Archaean grey gneiss terranes. These terranes are notably bimodal; andesitic rocks...
Waterfowl and their wintering grounds in Mexico, 1937-64
George B. Saunders, Dorothy Chapman Saunders
1981, Resource Publication 138
The U.S. Fish and Wildlife Service has been interested in migratory birds, especially waterfowl, in Mexico for many years, An early period of cooperation in waterfowl administration was culminated in 1937 with the final ratification of the Convention Between the United States and the United Mexican States for the Protection...
Gravity anomaly and interpretation map of the Chignik and Sutwik Island quadrangles, Alaska
J. E. Case, D.F. Barnes, R. L. Detterman, R. L. Morin, R. F. Sikora
1981, Miscellaneous Field Studies Map 1053-J
The gravity field of the Chignik and Sutwik Island quadrangles near the center of the Alaska Peninsula represents a complex series of transitions between probable continental crust on the north, probable oceanic crust on the south, sedimentary basins on each side of the peninsula, and a central structural high and volcanic arc. The resulting gravity field...
Floods in the English River basin, Iowa
A.J. Heinitz, D.E. Riddle
1981, Open-File Report 81-67
Information describing floods is essential for proper planning, design, and operation of bridges and other structures on or over streams and their flood plains. This report provides information on flood stages and discharges, flood magnitude and frequency, bench mark data, and flood profiles for the English River and some of its...
Procedures for the use of aircraft in wildlife biotelemetry studies
David S. Gilmer, Lewis M. Cowardin, Renee L. Duval, Larry M. Mechlin, Charles W. Shaiffer, V.B. Kuechle
1981, Resource Publication 140
This is a report on the state of the art methodology and on questions that arise while one is preparing to use aircraft in a biotelemetry study. In general the first step in preparing to mount an antenna on an aircraft is to consult with a certified aircraft mechanic. Aircraft...
Seismic-reflection and sidescan-sonar data collected off eastern Cape Cod, Massachusetts, during April 1979
Harley J. Knebel
1981, Open-File Report 81-184
The U.S. Geological Survey collected 98 line kilometers of single-channel seismic-reflection profiles and sidescan sonar records on the inner shelf of eastern Cape Cod, Massachusetts, during April 1979. The data were obtained during cruise NE-1-79 of the R/V NEECHO. The purposes of the survey were: (1) to study the development...
Remote-site data entry for the Gospel-Hump Wilderness Area, Idaho; experimental use of a microcomputer on RASS (Rock Analysis Storage System) data
J. Thomas Hanley
1981, Open-File Report 81-1100
Selected Mo and W assays from stream-sediment samples and panned heavy-mineral concentrates, Challis, Idaho 2° topographic quadrangle
James E. Callahan, E.F. Cooley, G. J. Neuerburg
1981, Open-File Report 81-1344
No abstract available....
Low-flow characteristics of Ohio streams
D.P. Johnson, K.D. Metzker
1981, Open-File Report 81-1195
Seismicity near Albuquerque, New Mexico, 1976-1978
Lawrence H. Jaksha, Jerry Locke
1981, Open-File Report 81-117
Potential flood and debris hazards at Cottonwood Cove, Lake Mead National Recreation Area, Clark County, Nevada
Otto Moosburner
1981, Open-File Report 80-1216
At Cottonwood Cove, Nevada, most of the existing dikes at the recreation sites are effective in diverting and routing floodflows, up to and including the 100-year flood, away from people and facilities. The dikes across Ranger Residence Wash and Access Road Wash at the mouth divert floods up to the...
