Gravity modelling across the Transantarctic Mountains, Northern Victoria Land
T.F. Redfield, J. C. Behrendt
1992, Book chapter, Recent Progress in Antarctic Earth Science: Terra Scientific Publishing Company
During GANOVEX V and GANOVEX VI, new gravity data were collected in northern Victoria Land. The GANOVEX V data cover the Mt. Melbourne 1:250.000 quadrangle, while the GANOVEX VI data Transantarctic Mountains south of the Drygalski Ice Tongue. The two data sets are connected by a coastal traverse. The measurements...
Diagenetic formation of bedded chert: Evidence from chemistry of the chert-shale couplet
Richard L. Murray, David L. Jones, Marilyn R. Buchholtz ten Brink
1992, Geology (20) 271-274
Theories concerning the formation of bedded chert traditionally have emphasized either depositional or diagenetic processes. Major and rare earth element data from Franciscan assemblage (Mesozoic) and Claremont Formation (Miocene) bedded chert sequences, along with physical observations such as the presence of rare and highly corroded radiolarians in shale interbeds, are...
Tertiary marine pelecypods of California and Baja California: Erycinidae through Carditidae
Ellen James Moore
1992, Professional Paper 1228-E
No abstract available....
Varied records of early Wisconsinan alpine glaciation in the western United States derived from weathering-rind thicknesses
Peter U. Clark, P.D. Lea
1992, GSA Special Papers 269-278
Weathering-rind thicknesses were measured on volcanic clasts in sequences of glacial deposits in seven mountain ranges in the western United States and in the Puget lowland. Because the rate of rind development decreases with time, ratios of rind thicknesses provide limits on corresponding age ratios. In all areas studied, deposits...
Remote sensing studies of the geomorphology of Surtsey, 1987-1991
James B. Garvin, R. S. Williams Jr.
1992, Report
The volcanic island of Surtsey, formed by explosive submarine and effusive subaerial eruptions between November 1963 and June 1967, consists of a complex combination of primary and redeposited tephra and alkaline olivine basalt lava flows in a 2.5 km2 area (Thorarinsson, 1967; Thorarinsson et al., 1964; Fridriksson, 1975). During the...
Hydrate detection
William P. Dillon, Thomas S. Ahlbrandt
1992, Conference Paper, Proceedings of the natural gas research and development contractors review meeting
No abstract available....
On the age of the penultimate full glaciation of New England
R. N. Oldale, S.M. Colman
1992, GSA Special Papers (270) 163-170
Tills that discontinuously underlie the late Wisconsinan till throughout New England represent the penultimate full glaciation of the region. In southern New England, the late Wisconsinan till and the tills that locally underlie it are informally referred to as upper and lower tills, respectively. For the most part, the ages...
Detection development needs for gas hydrates in sediments
R.D. Malone, William P. Dillon
1992, Conference Paper, Proceedings International Offshore and Polar Engineering Conference
No abstract available....
Physical oceanographic investigation of Massachusetts and Cape Cod Bays
W. Rockwell Geyer, George B. Gardner, Wendell S. Brown, James D. Irish, Bradford Butman, T.C. Loder, Richard P. Signell
1992, Report
This physical oceanographic study of the Massachusetts Bays (fig. 1) was designed to provide for the first time a bay-wide description of the circulation and mixing processes on a seasonal basis. Most of the measurements were conducted between April 1990 and June 1991 and consisted of moored observations to study...
Flow cytometry, morphometry and histopathology as biomarkers of benzo[a]pyrene exposure in brown bullheads (ameiurus nebulosus)
Andrew W. Grady, Ronald M. McLaughlin, Charles W. Caldwell, Christopher J. Schmitt, David L. Stalling
1992, Journal of Applied Toxicology (12) 165-177
Brown bullheads were given a single intraperitoneal dose of 0, 5, 25 or 125 mg kg−1 benzo[a]pyrene (BaP), a carcinogenic polycyclic aromatic hydrocarbon, and evaluated over 18 months. Flow cytometric analyses of hepatocyte DNA content indicated an increase in DNA synthesis in BaP-exposed fish prior to day 14 post-exposure. Thereafter, all...
Patterns and rates of sedimentation in Chesapeake Bay during the Holocene rise in sea level
S.M. Colman, J.P. Halka, C. Hobbs
Charles H. Fletcher, J.F. Wehmiller, editor(s)
1992, Book chapter, Quaternary coastal systems of the United States
No abstract available....
Correlation of pre-Carboniferous carbonate successions of northern Alaska
Julie A. Dumoulin, Anita G. Harris
Dennis K. Thurston, Kazuya Fujita, editor(s)
1992, Conference Paper, Proceedings: 1992 international conference on Arctic margins (MMS 94-0040)
Fault-bounded successions of pre-Carboniferous (meta)carbonate rocks occur throughout northern Alaska. Successions studied in detail are those in the York Mountains (Seward Peninsula), the western and eastern Baird Mountains (western Brooks Range), the Snowden Mountain area (central Brooks Range), and the Sublik and Sadlerochit Mountains (eastern Brooks range); they are correlated...
Kinematic evidence for extensional unroofing of the Franciscan Complex along the Coast Range Fault, Northern Diablo Range, California
T.A. Harms, A. S. Jayko, M. Clark Blake Jr.
1992, Tectonics (11) 228-241
Franciscan metagraywacke immediately below the Del Puerto ophiolite, an outlier of the Coast Range ophiolite in the northern Diablo Range, was sheared during top‐to‐the‐east displacement on the Coast Range fault. This represents normal faulting and extensional offset. It was accompanied by attenuation of the Coast Range ophiolite and Great Valley...
530 Ma zircon age for ophiolite from the New England orogen: Oldest rocks known from eastern Australia
J.C. Aitchinson, T. R. Ireland, M. Clark Blake Jr., P.G. Flood
1992, Geology (20) 125-128
New ion microprobe data provide constraints on the timing of formation of ophiolitic rocks in the New England tectonic collage in eastern Australia. Results for analyses of magmatic zircons from plagiogranite of the Weraerai terrane ophiolite at Upper Bingara give a 206pb/238|j ag e Qf 53Q ± 6 Ma (2a)....
Rift flank uplifts and Hinterland Basins: Comparison of the Transantarctic Mountains with the Great Escarpment of southern Africa
Uri S. ten Brink, T. Stern
1992, Journal of Geophysical Research B: Solid Earth (97) 569-585
Uplifted rift margins are a common feature of continents and oceans. Two variants of rift flank morphologies have been recognized: One in which the topography warps down from an inland high toward the continental margin, and one where the tropographic peak lies close to the continental margin. The Great Escarpment...
Comment and Reply on "SeaMARC II mapping of transform faults in the Cayman Trough, Caribbean Sea"
N. Terence Edgar, William P. Dillon, Eric Rosencrantz, Paul Mann
1992, Geology (20) 382-384
No abstract available....
Sea-level rise and its implications to coastal planning and management
D. L. Peck, S.J. Williams
P. Fabbri, editor(s)
1992, Conference Paper, Ocean Management in Global Change: Proceedings of the Conference on Ocean Management in Global Change
No abstract available....
Rare earth, major, and trace element composition of Monterey and DSDP chert and associated host sediment: Assessing the influence of chemical fractionation during diagenesis
R.W. Murray, Marilyn R. Buchholtz ten Brink, David C. Gerlach, G. Price Russ, David L. Jones
1992, Geochimica et Cosmochimica Acta (56) 2657-2671
Chert and associated host sediments from Monterey Formation and Deep Sea Drilling Project (DSDP) sequences were analyzed in order to assess chemical behavior during diagenesis of biogenic sediments. The primary compositional contrast between chert and host sediment is a greater absolute SiO2 concentration in chert, often with final SiO2 ≥ 98 wt%....
Seismic noise on Rarotonga: Surface versus downhole
Rhett Butler, C. R. Hutt
1992, Eos, Earth and Space Science News (73) 548-549
Seismic noise data are presented from the new Global Seismographic Network station, RAR, on the Island of Rarotonga in the South Pacific. Data from the first new borehole site in the GSN are compared with a surface vault installation. Initial indications from the data show that borehole siting on a...
Evidence from the Lamarck granodiorite for rapid late Cretaceous crust formation in California
D.S. Coleman, A. F. Glazner, T. P. Frost
1992, Science (258) 1924-1926
Strontium and neodymium isotopic data for rocks from the voluminous 90-million-year-old Lamarck intrusive suite in the Sierra Nevada batholith, California, show little variation across a compositional range from gabbro to granite. Data for three different gabbro intrusions within the suite are identical within analytical error and are consistent with derivation...
Synchronism of the Siberian Traps and the Permian-Triassic boundary
I.H. Campbell, Gerald K. Czamanske, V.A. Fedorenko, R.I. Hill, V. Stepanov
1992, Science (258) 1760-1763
Uranium-lead ages from an ion probe were taken for zircons from the ore-bearing Noril'sk I intrusion that is comagmatic with, and intrusive to, the Siberian Traps. These values match, within an experimental error of ±4 million years, the dates for zircons extracted from a tuff at the Permian-Triassic (P-Tr) boundary....
Strain accumulation across the Wasatch Fault near Ogden, Utah
James C. Savage, Michael Lisowski, W.H. Prescott
1992, Journal of Geophysical Research B: Solid Earth (97) 2071-2083
Deformation of a 70 by 40‐km trilateration network spanning the north trending Wasatch fault near Ogden, Utah, has been monitored from 1972 through 1990. All but nine of the 200 measurements are consistent with deformation that is linear in time. We presume that those nine observations are contaminated by some...
Interseismic deformation at the Nankai Trough, Japan, subduction zone
James C. Savage, Wayne R. Thatcher
1992, Journal of Geophysical Research B: Solid Earth (97) 11117-11135
Uplift along the coast of southwestern Japan following the 1944 Tonankai (Ms = 8.0) and 1946 Nankaido (Ms = 8.2) earthquakes has been inferred from the 1950–1985 tide gage records. Although uplift rates vary with geographic position, the temporal dependence at each site can be described as the superposition of an exponentially...
Coulomb plasticity within the fault zone
J.D. Byerlee, James C. Savage
1992, Geophysical Research Letters (19) 2341-2344
We represent a well‐developed fault by a layer of granular material (fault gouge) confined between two competent fault blocks. Slip on such a fault involves plastic shearing of the fault gouge. That is, the fault gouge behaves as a Coulomb material, and the plastic flow is accomplished by slip on...
The influence of pressure on petroleum generation and maturation as suggested by aqueous pyrolysis
L.C. Price, L.M. Wenger
1992, Organic Geochemistry (19) 141-159
Because fluid pressures are transient in sedimentary basins over geologic time, the effect of increasing fluid pressure on organic-matter metamorphism is difficult to determine, and conflicting opinions exist concerning its influence. Properly-performed aqueous-pyrolysis experiments can closely simulate hydrocarbon generation and maturation in nature, and thus offer an excellent way to...
