Effects of prolacton chloride cells opercular membrane of seawater-adapted tilapia
T.M. Herndon, S. D. McCormick, H. A. Bern
1991, General and Comparative Endocrinology (83) 283-289
Effects of prolactin on morphology and numbers of chloride cells in the opercular membrane of seawater-adapted tilapia (Oreochromis mossambicus) have been examined. Following five daily injections of ovine prolactin at a dose of 10 μg · g body wt−1, blood samples were taken and opercular membranes were removed and stained...
Osmoregulatory actions of insulin-like growth factor-I in rainbow trout (Oncorhynchus mykiss)
S. D. McCormick, T. Sakamoto, S. Hasegawa, T. Hirano
1991, Journal of Endocrinology (130) 87-92
The ability of insulin-like growth factor-I (IGF-I), insulin and GH to promote hypoosmoregulatory ability was examined in juvenile rainbow trout (Oncorhynchus mykiss). Following adaptation to 12 parts per thousand (p.p.t.) seawater for 5 days, fish were given a single injection of hormone or vehicle, then exposed to 29 p.p.t. for...
Geochemical transformations and modeling of two deep-well injected hazardous wastes
William R. Roy, B. Seyler, J.D. Steele, S.C. Mravik, D.M. Moore, I.G. Krapac, J.M. Peden, R. A. Griffin
1991, Groundwater (29) 671-677
Two liquid hazardous wastes (an alkaline brine-like solution and a dilute acidic waste) were mixed with finely ground rock samples of three injection-related lithologies (sandstone, dolomite, and siltstone) for 155 to 230 days at 325°K-10.8 MPa. The pH and inorganic chemical composition of the alkaline waste were not significantly altered...
The ecological and evolutionary consequences of body size: Introductory remarks
John F. Piatt
Ben D. Bell, R.O. Cossee, J.E.C. Flux, B.D. Heather, R.A. Hitchmough, C.J.R. Robertson, M.J. Williams, editor(s)
1991, Conference Paper, Proceedings: 20th international ornithological congress
No abstract available....
Visible and near-infrared (0.4-2.5 μm) reflectance spectra of playa evaporite minerals
James K. Crowley
1991, Journal of Geophysical Research (96) 16231-16240
Visible and near-infrared (VNIR; 0.4–2.4 μm) reflectance spectra were recorded for 35 saline minerals that represent the wide range of mineral and brine chemical compositions found in playa evaporite settings. The spectra show that many of the saline minerals exhibit diagnostic near-infrared absorption bands, chiefly attributable to vibrations of hydrogen-bonded...
Morphological development of the Florida Escarpment: Observations on the generation of time transgressive unconformities in carbonate terrains
C. K. Paull, D.C. Twichell, Fred N. Spiess, Joseph R. Curray
1991, Marine Geology (101) 181-201
An unconformity of 100 m.yr magnitude continues to form on the western edge of the Florida-Bahama Platform, near 26??N, where distal Mississippi Fan sediments are progressively burying the Florida Escarpment. Multiple perspectives of the developing unconformity's morphology are revealed using available technologies including GLORIA images of the entire platform's edge,...
Heat capacities and entropies of sillimanite, fibrolite, andalusite, kyanite, and quartz and the Al2SiO5 phase diagram
B. S. Hemingway, R. A. Robie, H. T. Evans Jr., Derrill M. Kerrick
1991, American Mineralogist (76) 1597-1613
Low-temperature heat capacities for sillimanite, fibrolite, and both fine-grained and coarse-grained quartz have been measured. Superambient heat capacities have been measured for four sillimanite, two andalusite, one kyanite, and two fibrolite samples. Equations are recommended for the temperature dependence of the heat capacities of kyanite, andalusite, sillimanite, and fibrolite. The...
Field and modelling studies of immiscible fluid flow above a contaminated water-table aquifer
W.N. Herkelrath, H.I. Essaid, K.M. Hess
1991, Conference Paper, National Conference Publication - Institution of Engineers, Australia
A method was developed for measuring the spatial distribution of immiscible liquid contaminants in the subsurface. Fluid saturation distributions measured at a crude-oil spill site were used to test a numerical multiphase flow model....
Observations constraining near-source ground motion estimated from locally recorded seismograms
Art McGarr
1991, Journal of Geophysical Research (96) 16495-16508
To estimate the seismic hazard to underground facilities or operations in the environs of a mining-induced tremor or a natural earthquake, it is useful to be able to relate locally recorded seismic waveforms to peak ground velocity and slip at the causative fault. For this...
Boron analysis by electron microprobe using MoB4C layered synthetic crystals
J. J. McGee, J. F. Slack, C.R. Herrington
1991, American Mineralogist (76) 681-684
Preliminary electron microprobe studies of B distribution in minerals have been carried out using MoB4C-layered synthetic crystals to improve analytical sensitivity for B. Any microprobe measurements of the B contents of minerals using this crystal must include analyses for Cl to assess and correct for the interference of Cl X-rays...
Vanadium accumulation in carbonaceous rocks: A review of geochemical controls during deposition and diagenesis
G. N. Breit, R. B. Wanty
1991, Chemical Geology (91) 83-97
Published data relevant to the geochemistry of vanadium were used to evaluate processes and conditions that control vanadium accumulation in carbonaceous rocks. Reduction, adsorption, and complexation of dissolved vanadium favor addition of vanadium to sediments rich in organic carbon. Dissolved vanadate (V(V)) species predominate in oxic seawater and are reduced...
Mesh-size effects on drift sample composition as determined with a triple net sampler
K. V. Slack, L. J. Tilley, S.S. Kennelly
1991, Hydrobiologia (209) 215-226
Nested nets of three different mesh apertures were used to study mesh-size effects on drift collected in a small mountain stream. The innermost, middle, and outermost nets had, respectively, 425 ??m, 209 ??m and 106 ??m openings, a design that reduced clogging while partitioning collections into three size groups. The...
14C age of the "Museum Breccia" (Campi Flegrei) and its relevance for the origin of the Campanian Ignimbrite
L. Lirer, G. Rolandi, M. Rubin
1991, Journal of Volcanology and Geothermal Research (48) 223-227
Field stratigraphic investigations and AMS 14C dating of carbon particles in paleosols has resulted in a framework of the sequence and age of the pyroclastic products in the Campi Flegrei area of Southern Italy. The Museum Breccia cannot be the early phase of the Campanian Ignimbrite, as was previously believed,...
Paleomagnetic evidence for the age and extent of middle Tertiary counterclockwise rotation, Dixie Valley region, west central Nevada
M.R. Hudson, J. W. Geissman
1991, Journal of Geophysical Research (96) 3979-4006
Paleomagnetic data obtained from Oligocene to lower Miocene igneous rocks and middle Miocene basaltic rocks at fifteen localities from a region surrounding Dixie Valley in west central Nevada indicate that parts of the area experienced counterclockwise vertical-axis rotation, and these data provide constraints on the...
Boromuscovite, a new member of the mica group, from the Little Three mine pegmatite, Ramona district, San Diego County, California
E.E. Foord, R.F. Martin, J. J. Fitzpatrick, J.E. Taggart Jr., J.G. Crock
1991, American Mineralogist (76) 1998-2002
Boromuscovite, ideally KAl2(Si3B)O10(OH,F)2, in which [4]Al is replaced by B relative to muscovite, occurs as a late-stage, postpocket rupture mineral within the New Spaulding Pocket, main Little Three pegmatite dike. The mineral is white to cream colored and occurs as a porcelaneous veneer and coating on primary minerals. The...
Thermodynamic properties of anthophyllite and talc: corrections and discussion of calorimetric data
B. S. Hemingway
1991, American Mineralogist (76) 1589-1596
Arithmetic errors in calculating heat capacity values (Krupka, 1984; Krupka et al, 1985a) for anthophyllite and several errors in the Hess cycles utilized to derive enthalpies of formation of anthophyllite and talc are identified, and revised values are reported. -from Author...
The collision zone between the North d'Entrecasteaux Ridge and the New Hebrides island arc. 2. Structure from multichannel seismic data
M. A. Fisher, J.-Y. Collot, E.L. Geist
1991, Journal of Geophysical Research (96) 4479-4495
The d'Entrecasteaux zone (DEZ) collides with the central New Hebrides island arc and consists of two subparallel ridges that strike east-west, stand 1–2 km above the surrounding oceanic plate, and subduct obliquely (15°) northward beneath the arc. Rocks dredged from the north ridge as well...
Comment on "Mid-ocean ridge popping rocks: implications for degassing at ridge crests" by P. Sarda and D. Graham
T.M. Gerlach
1991, Earth and Planetary Science Letters (105) 566-567
No abstract available....
The transition from hydrostatic to greater than hydrostatic fluid pressure in presently active continental hydrothermal systems in crystalline rock
R.O. Fournier
1991, Geophysical Research Letters (18) 955-958
Fluid flow at hydrostatic pressure (Ph) is relatively common through fractures in silicic and in mafic crystalline rocks where temperatures are less than about 350–370°C. In contrast, pore-fluid pressure (Pf) > Ph has been encountered at the bottom of 3 geothermal exploration wells that attained temperatures >370°C...
Erosion and accretion along the arctic coast of Alaska. The influence of ice and climate
Peter W. Barnes, Bonnie P. Rollyson
1991, Conference Paper, Coastal Sediments '91; Volume 2
Coastline comparison on 1951 and 1981 charts to determine erosion and accretion showed that ocean-facing coastal bluffs were retreating while deltas were rapidly expanding. Where the coast is fronted by a lagoon, and coast-parallel sand and gravel islands, bluff retreat was reduced. The extensive bluff erosion was volumetrically balanced by...
Seismic response of transamerical building. I. Data and preliminary analysis
M. Çelebi, E. Safak
1991, Journal of Structural Engineering (117) 2389-2404
The objective of this paper is to present preliminary analyses of a set of acceleration response records obtained during the October 17, 1989 Loma Prieta earthquake (Ms = 7.1) from the 60-story vertically tapered, pyramid-shaped Trans-america Building-a landmark of San Francisco. The building was instrumented in 1985 with 22 channels...
Geological and seismological evidence of increased explosivity during the 1986 eruptions of Pavlof volcano, Alaska
S.R. McNutt, T. P. Miller, J.J. Taber
1991, Bulletin of Volcanology (53) 86-98
We present results of study of the best-documented eruptions of Pavlof volcano in historic time. The 1986 eruptions were mostly Strombolian in character; a strong initial phase may have been Vulcanian. The 1986 activity erupted at least 8??106 m3 of feldspar-phyric basaltic andesite lava (SiO2=53-54%), and a comparable volume of...
How do foraging seabirds sample their environment?
G.L. Hunt Jr., John F. Piatt, Kjell Einar Erikstad
Ben D. Bell, R.O. Cossee, J.E.C. Flux, B.D. Heather, R.A. Hitchmough, C.J.R. Robertson, M.J. Williams, editor(s)
1991, Conference Paper, Proceedings: 20th international ornithological congress
No abstract available....
Late Laramide thrust-related and evaporite-domed anticlines in the southern Piceance Basin, northeastern Colorado Plateau
M. A. Grout, G. A. Abrams, R. L. Tang, T. J. Hainsworth, E.R. Verbeek
1991, American Association of Petroleum Geologists Bulletin (75) 205-218
New seismic and gravity data across the hydrocarbon-producing Divide Creek and Wolf Creek anticlines in the southern Piceance basin reveal contrasting styles of deformation within two widely separated time frames. Seismic data indicate that prebasin Paleozoic deformation resulted in block faulting of the Precambrian crystalline basement rocks and overlying Cambrian...
Caution on the use of Viton® or FETFE® O-rings in carbon dioxide sample containers for δ180 analysis
Kinga M. Revesz, Tyler B. Coplen
1991, Chemical Geology: Isotope Geoscience Section (86) 259-261
After 10 days, 3-μmol CO2 samples in containers having glass stopcocks with Viton® or FETFE O-rings were enriched in 18O by 1.5% as a result of absorption by the elastomer; this amount of enrichment is ∼20 times greater than the precision of δ18O measurements of most laboratories. No change in 13C content was observed....
