Moment-tensor solutions estimated using optimal filter theory: Global seismicity, 1994
S.A. Sipkin, M.D. Zirbes
1996, Physics of the Earth and Planetary Interiors (93) 139-146
Moment-tensor solutions, estimated using optimal filter theory, are listed for 177 moderate-to-large size earthquakes occurring during 1994....
Constraints on the thermal history of Taylorsville Basin, Virginia, U.S.A., from fluid-inclusion and fission-track analyses: Implications for subsurface geomicrobiology experiments
H.-Y. Tseng, T.C. Onstott, R.C. Burruss, D. S. Miller
1996, Chemical Geology (127) 297-311
Microbial populations have been found at the depth of 2621-2804 m in a borehole near the center of Triassic Taylorsville Basin, Virginia. To constrain possible scenarios for long-term survival in or introduction of these microbial populations to the deep subsurface, we attempted to refine models of thermal and burial history...
Experimental early-stage coalification of a peat sample and a peatified wood sample from Indonesia
W. H. Orem, S.G. Neuzil, H.E. Lerch, C. B. Cecil
1996, Conference Paper, Organic Geochemistry
Experimental coalification of a peat sample and a buried wood sample from domed peat deposits in Indonesia was carried out to examine chemical structural changes in organic matter during early-stage coalification. The experiment (125 C, 408 atm lithostatic pressure, and 177 atm fluid pressure for 75 days) was designed to...
Porphyry deposits of the Canadian Cordillera
W.J. McMillan, J. F. H. Thompson, C.J.R. Hart, S.T. Johnston
1996, Geoscience Canada (23) 125-134
Porphyry deposits are intrusion-related, large tonnage low grade mineral deposits with metal assemblages that may include all or some of copper, molybdenum, gold and silver. The genesis of these deposits is related to the emplacement of intermediate to felsic, hypabyssal, generally porphyritic intrusions that are commonly formed at convergent plate...
Analysis of non-ortho-PCBs in fish, bird eggs, sediments, soils, and SPMD samples by gas chromatography/high resolution mass spectrometry: Chapter 27
Paul H. Peterman, Robert W. Gale, Donald E. Tillitt, Kevin P. Feltz
Gary K. Ostrander, editor(s)
1996, Book chapter, Techniques in aquatic toxicology
No abstract available....
Meeting summary - Coastal meteorology and oceanography: Report of the third prospectus development team of the U.S. Weather Research Program to NOAA and NSF
R. Rotunno, L.J. Pietrafesa, J. S. Allen, B.R. Colman, C.M. Dorman, C.W. Kreitzberg, S.J. Lord, M.G. McPhee, G.L. Mellor, C.N.K. Mooers, P.P. Niiler, R.A. Pielke Sr., M.D. Powell, D.P. Rogers, J.D. Smith, Lingtian Xie, R. Carbone
1996, Conference Paper, Bulletin of the American Meteorological Society
U.S. Weather Research Program (USWRP) prospectus development teams (PDTs) are small groups of scientists that are convened by the USWRP lead scientist on a one-time basis to discuss critical issues and to provide advice related to future directions of the program. PDTs are a principal source of information for the...
Mercury removal from combustion flue gas by activated carbon injection: Mass transfer effects
S. Chen, M. Rostam-Abadi, R. Chang
1996, ACS Division of Fuel Chemistry, Preprints (41) 442-446
[No abstract available]...
Type of faulting and orientation of stress and strain as a function of space and time in Kilauea's south flank, Hawaii
D. Gillard, M. Wyss, P. Okubo
1996, Journal of Geophysical Research B: Solid Earth (101) 16025-16042
Earthquake focal mechanisms of events occurring between 1972 and 1992 in the south flank of Kilauea volcano, Hawaii, are used to infer the state of stress and strain as a function of time and space. We have determined 870 fault plane solutions from P wave first motion polarities for events with magnitudes ML ≥...
Gas-phase axial dispersion in a spray tower
Brian J. Vinci, Barnaby J. Watten, Michael Timmons
1996, Aquacultural Engineering (15) 1-11
Gas-phase axial dispersion (mixing of the composition of the gas phase along the longitudinal axis) was characterized in an enclosed spray tower for purposes of establishing reactor type for the solute-solvent pair oxygen and water. Test condition variables were spray tower height (TH), 1·52, 2·03 and 2·54 m; hydraulic loading...
Production of activated char from Illinois coal for flue gas cleanup
A.A. Lizzio, J.A. DeBarr
1996, ACS Division of Fuel Chemistry, Preprints (41) 427-430
[No abstract available]...
Crustal structure of a transform plate boundary: San Francisco Bay and the central California continental margin
W.S. Holbrook, T.M. Brocher, Uri S. ten Brink, J.A. Hole
1996, Journal of Geophysical Research B: Solid Earth (101) 22311-22334
Wide-angle seismic data collected during the Bay Area Seismic Imaging Experiment provide new glimpses of the deep structure of the San Francisco Bay Area Block and across the offshore continental margin. San Francisco Bay is underlain by a veneer (<300 m) of sediments, beneath which P wave velocities increase rapidly...
Li- and F-bearing alkali amphibole from granitic pegmatite at Hurricane Mountain, Carroll County, New Hampshire
E.E. Foord, Richard C. Erd, S.B. Robie, F.E. Lichte, V.T. King
1996, Canadian Mineralogist (34) 1011-1014
At Hurricane Mountain, Carroll County, New Hampshire, bodies of granitic pegmatite in riebeckite granite contain large (up to 10 cm long and 2 cm across) primary crystals of Li-bearing fluor-arfvedsonite in miarolitic cavities, grading to euhedral Li- and F-poor arfvedsonite. Fine-grained, fibrous, light blue-gray riebeckite occurs as a late-stage hydrothermal...
Springflow effects on chemical loads in the Snake River, south-central Idaho
G. M. Clark, D.S. Ott
1996, Water Resources Bulletin (32) 553-563
The 150-kilometer middle reach of the Snake River (middle Snake) in south-central Idaho receives large quantities of water from springs discharging along the north side of the river from the regional Snake River Plain aquifer. Water-quality samples collected from nine north- side springs in April 1994 indicated that springs in...
Geology of 243 Ida
R. Sullivan, R. Greeley, R. Pappalardo, E. Asphaug, Johnnie N. Moore, D. Morrison, M. J. S. Belton, M. Carr, C. R. Chapman, Paul E. Geissler, R. Greenberg, J. Granahan, J. W. Head III, Randolph L. Kirk, A. McEwen, P. Lee, P.C. Thomas, J. Veverka
1996, Icarus (120) 119-139
The surface of 243 Ida is dominated by the effects of impacts. No complex crater morphologies are observed. A complete range of crater degradation states is present, which also reveals optical maturation of the surface (darkening and reddening of materials with increasing exposure age). Regions of bright material associated with...
A camerate-rich late carboniferous (Moscovian) crinoid fauna from volcanic conglomerate, Xinjiang, People's Republic of China
N.G. Lane, J.A. Waters, C.G. Maples, S.A. Marcus, Z.-T. Liao
1996, Journal of Paleontology (70) 117-128
A low-diversity camerate-rich crinoid fauna from the Qijiagou Formation, Taoshigo Valley near Turpan, Xinjiang-Uygar Autonomous Region, China was collected during field work in May, 1993. The crinoid fauna is dominated by species of Platycrinites. Other camerate crinoids include a species in the Paragaricocrinidae, Actinocrinites, a hexacrinitid, and an acrocrinoid. The...
Testing and validating environmental models
J.W. Kirchner, R. P. Hooper, C. Kendall, C. Neal, G. Leavesley
1996, Science of the Total Environment (183) 33-47
Generally accepted standards for testing and validating ecosystem models would benefit both modellers and model users. Universally applicable test procedures are difficult to prescribe, given the diversity of modelling approaches and the many uses for models. However, the generally accepted scientific principles of documentation and disclosure provide a useful framework...
Use of liquefaction-induced features for paleoseismic analysis
S. F. Obermeier
1996, Engineering Geology (44) 1-76
Liquefaction features can be used in many field settings to estimate the recurrence interval and magnitude of strong earthquakes through much of the Holocene. These features include dikes, craters, vented sand, sills, and laterally spreading landslides. The relatively high seismic shaking level required for their formation makes them particularly valuable...
Ecosystem management and fishery resources of the Antarctic
J.E. McKenna Jr.
1996, Ecosystem Health (2) 110-126
Three-dimensional P and S wave velocity structure of Redoubt Volcano, Alaska
H.M. Benz, B. A. Chouet, P.B. Dawson, J.C. Lahr, R.A. Page, J.A. Hole
1996, Journal of Geophysical Research B: Solid Earth (101) 8111-8128
The three‐dimensional P and S wave structure of Redoubt Volcano, Alaska, and the underlying crust to depths of 7–8 km is determined from 6219 P wave and 4008 S wave first‐arrival times recorded by a 30‐station seismograph network deployed on and around the volcano. First‐arrival times are calculated using a finite‐difference technique, which allows for flexible parameterization of...
Little Ice Age evidence from a south-central North American ice core, U.S.A.
D. L. Naftz, R.W. Klusman, R. L. Michel, P. F. Schuster, M.M. Ready, Howard E. Taylor, T.M. Yanosky, E.A. McConnaughey
1996, Arctic and Alpine Research (28) 35-41
In the past, ice-core records from mid-latitude glaciers in alpine areas of the continental United States were considered to be poor candidates for paleoclimate records because of the influence of meltwater on isotopic stratigraphy. To evaluate the existence of reliable paleoclimatic records, a 160-m ice core, containing about 250 yr...
Potential methane emission from north-temperate lakes following ice melt
C.M. Michmerhuizen, Robert G. Striegl, M.E. McDonald
1996, Limnology and Oceanography (41) 985-991
Methane, a radiatively active 'greenhouse' gas, is emitted from lakes to the atmosphere throughout the open-water season. However, annual lake CH4 emissions calculated solely from open-water measurements that exclude the time of spring ice melt may substantially underestimate the lake CH4 source strength. We estimated potential spring CH4 emission at...
Zostera marina (eelgrass) growth and survival along a gradient ofnutrients and turbidity in the lower Chesapeake Bay
K.A. Moore, H.A. Neckles, R.J. Orth
1996, Marine Ecology Progress Series (142) 247-259
Survival of transplanted Zostera marina L. (eelgrass), Z. marina growth,and environmental conditions were studied concurrently at a number of sitesin a southwestern tributary of the Chesapeake Bay to elucidate the factorslimiting macrophyte distribution in this region. Consistent differences insurvival of the transplants were observed, with no long-term survival at anyof...
Shallow velocity structure and Poisson's ratio at the Tarzana, California, strong-motion accelerometer site
R. D. Catchings, W.H.K. Lee
1996, Bulletin of the Seismological Society of America (86) 1704-1713
The 17 January 1994, Northridge, California, earthquake produced strong ground shaking at the Cedar Hills Nursery (referred to here as the Tarzana site) within the city of Tarzana, California, approximately 6 km from the epicenter of the mainshock. Although the Tarzana site is...
Loess studies in central United States: Evolution of concepts
L.R. Follmer
1996, Engineering Geology (45) 287-304
Few words in the realm of earth science have caused more debate than "loess". It is a common term that was first used as a name of a silt deposit before it was defined in a scientific sense. Because this "loose" deposit is easily distinguished from other more coherent deposits,...
The Flinn-Engdahl Regionalisation Scheme: The 1995 revision
J.B. Young, B.W. Presgrave, H. Aichele, D.A. Wiens, E.A. Flinn
1996, Physics of the Earth and Planetary Interiors (96) 223-297
The Flinn-Engdahl Regionalisation Scheme, also known as the F-E Code, has been used by seismologists for many years to identify and specify regions of the Earth. The Working Group on Regionalisation of the International Association of Seismology and Physics of the Earth's Interior (IASPEI) Commission on Practice has the task...
