Roof-rock contamination of magma along the top of the reservoir for the Bishop Tuff
W. A. Duffield, J. Ruiz, J.D. Webster
1995, Journal of Volcanology and Geothermal Research (69) 187-195
The Bishop Tuff, a Quaternary high-silica rhyolite in east-central California, is widely considered the type example of a vertically and monotonically zoned pyroclastic deposit that represents zoning in the source magma reservoir, inverted during the process of pyroclastic emplacement. However, the deposit of plinian pumice, which forms the base of...
Adjusting stream-sediment geochemical maps in the Austrian Bohemian Massif by analysis of variance
J.C. Davis, G. Hausberger, O. Schermann, G. Bohling
1995, Mathematical Geology (27) 279-299
The Austrian portion of the Bohemian Massif is a Precambrian terrane composed mostly of highly metamorphosed rocks intruded by a series of granitoids that are petrographically similar. Rocks are exposed poorly and the subtle variations in rock type are difficult to map in the field. A detailed geochemical survey of...
Pink topaz from the Thomas Range, Juab County, Utah
E.E. Foord, W. Chirnside, F.E. Lichte, Paul H. Briggs
1995, Mineralogical Record (26) 57-60
The Thomas Range is world-famous for its production of topaz Al2SiO4(F,OH)2, occurring in lithophysal cavities in rhyolite. Topaz Valley, at the southern end of the range, is perhaps the single most famous locality. While fine-quality, sherry-orange crystals to 5 cm or more in length occur at various localities, pale to...
Validation of national land-cover characteristics data for regional water-quality assessment
Ronald B. Zelt, Jesslyn F. Brown, M.S. Kelley
1995, Geocarto International (10) 69-80
Land-cover information is used routinely to support the interpretation of water-quality data. The Prototype 1990 Conterminous US Land Cover Characteristics Data Set, developed primarily from Advanced Very High Resolution Radiometer (AVHRR) data, was made available to the US Geological Survey's National Water-Quality Assessment (NAWQA) Program. The study described in this...
The role of palynology in paleoecological analyses of Tertiary coals
D. J. Nichols
1995, International Journal of Coal Geology (28) 139-159
Pollen, spores, and other plant microfossils are important constituents of Tertiary coals, both as petrographic components (the maceral sporinite) and as distinctive indicators of the nature of the depositional environment in which the coal-forming peat accumulated. Palynological analyses, which have been...
Preferential flow and segregation of porewater solutes in Wetland sediment
J. W. Harvey, R.M. Chambers, J.R. Hoelscher
1995, Estuaries (18) 568-578
Sediment macropores (with effective diameters larger than 100 ??m) comprise 11% of the bulk sediment volume in a tidal freshwater wetland vegetated with Peltandra virginica. In order to determine effects of macroporous sediment structure on solute transport, we conducted a solute tracer experiment in the sediment. The effective transport volume...
Impact of flooding on the densities of selected aquatic insects
A.C. Hendricks, L.D. Willis, C. Snyder
1995, Hydrobiologia (299) 241-247
Data from a four-year study of five aquatic insect species,Hydropsyche betteni, H. morosa, H. bronta, Isonychia bicolor, andEphoron leucon, were utilized to evaluate the impact of a 60-year flood and a few lesser floods. The survey began in August, 1984 and was terminated in October, 1987...
The Uwekahuna Ash Member of the Puna Basalt: product of violent phreatomagmatic eruptions at Kilauea volcano, Hawaii, between 2800 and 2100 14C years ago
D. Dzurisin, J. P. Lockwood, T. J. Casadevall, M. Rubin
1995, Journal of Volcanology and Geothermal Research (66) 163-184
Kilauea volcano's reputation for relatively gentle effusive eruptions belies a violent geologic past, including several large phreatic and phreatomagmatic eruptions that are recorded by Holocene pyroclastic deposits which mantle Kilauea's summit area and the southeast flank of adjacent Mauna Loa volcano. The most widespread of these deposits is the Uwekahuna...
Petrography, geochemistry, and depositional setting of the San Pedro and Santo Tomas coal zones: Anomalous algae-rich coals in the middle part of the Claiborne Group (Eocene) of Webb County, Texas
Peter D. Warwick, Robert W. Hook
1995, International Journal of Coal Geology (28) 303-342
Two coal zones, the San Pedro and the overlying Santo Tomas, are present for nearly 35 km in outcrop, surface and underground mines, and shallow drill holes along the strike of the middle part of the Claiborne Group (Eocene) in Webb County, Texas. A sandstone-dominated interval of 25 to 35...
Proterozoic low-Ti iron-oxide deposits in New York and New Jersey: Relation to Fe-oxide (Cu-U-Au-rare earth element) deposits and tectonic implications
M. P. Foose, J. M. McLelland
1995, Geology (23) 665-668
Low-Ti iron-oxide deposits in exposed Grenville-age rocks of New York and New Jersey belong to a distinct class of iron-oxide (Cu-U-Au–rare earth element [REE]) deposits that includes similar iron deposits in southeastern Missouri and the Kiruna district of Sweden, the giant Olympic Dam...
Gonadal steroidogenesis in-vitro from juvenile alligators obtained from contaminated or control lakes
Louis J. Guillette Jr., Timothy S. Gross, D. A. Gross, A. A. Rooney, H. Franklin Percival
1995, Environmental Health Perspectives (103) 31-36
The ubiquitous distribution of many contaminants and the nonlethal, multigenerational effects of such contaminants on reproductive, endocrine, and immune systems have led to concerns that wildlife worldwide are affected. Although the causal agents and effects are known for some species, the underlying physiological mechanisms associated with contaminant-induced reproductive modifications are...
Size-dependent, sex-dependent and seasonal changes in insulin-lige growth-factor-I in the loggerhead sea turtle
D.A. Crain, A.B. Bolten, K.A. Bjorndal, L. J. Guillette, T. S. Gross
1995, General and Comparative Endocrinology (98) 219-226
This study examines size-dependent, sex-dependent, and seasonal fluctuations in plasma insulin-like growth factor-I (IGF-I) concentrations in loggerhead sea turtles (Caretta caretta). Loggerhead turtles (n = 158) were captured in shrimp trawler nets during a 12-month survey in Cape Canaveral Channel, Florida. Plasma samples were analyzed using a validated heterologous radioimmunoassay. Large...
Difference in the crab fauna of mangrove areas at a southwest Florida and a northeast Australia location: Implications for leaf litter processing
C.C. McIvor, T. J. Smith III
1995, Estuaries (18) 591-597
Existing paradigms suggest that mangrove leaf litter is processed primarily via the detrital pathway in forests in the Caribbean biogeographic realm whereas herbivorous crabs are relatively more important litter processors in the Indo-West Pacific. To test this hypothesis, we used pitfall traps to collect intertidal crabs to characterize the crab...
Disarticulation of turtle shells in north-central Florida: How long does a shell remain in the woods?
C.K. Dodd Jr.
1995, American Midland Naturalist (134) 378-387
From 1985 through 1991, I examined and categorized the sequential shell disarticulation patterns of 80 turtle specimens, representing six species and three families, in N-central Florida. Shells were allowed to disarticulate on land under natural environmental conditions. Turtle shells were observed from 5-54 mo. Based on examinations of photos, nine...
Stratigraphy and paleoenvironments of the Shell 410-1 well, Georges Bank Basin, US North Atlantic outer continental shelf
L. J. Poppe, C. W. Poag, B.A. Swift
1995, Northeastern Geology and Environmental Sciences (17) 259-270
The Shell 410-1 well is the most downdip (seaward) hydrocarbon exploratory well in the Georges Bank Basin. It was drilled to a total depth of 4745 m RKB, and penetrated a section composed of Middle Jurassic to Quaternary sedimentary rocks. The lithostratigraphy of the section is described. The strata penetrated...
Can Dugongs Survive in Palau?
H. Marsh, G. B. Rathbun, T. J. O'Shea, A.R. Preen
1995, Biological Conservation (72) 85-89
In August 1991 we surveyed dugongs Dugong dugon in the coastal waters of Palau using methods similar to aerial surveys conducted in 1977, 1978 and 1983. Twenty-six dugongs (including four calves) were seen, a count within the range obtained previously. The rate at which dugongs were seen per unit flight-time was lower...
Wind damage effects of Hurricane Andrew on mangrove communities along the southwest coast of Florida, USA
T.W. Doyle, T. J. Smith III, M. B. Robblee
1995, Journal of Coastal Research 159-168
On August 24, 1992, Hurricane Andrew downed and defoliated an extensive swath of mangrove trees across the lower Florida peninsula. Permanent field sites were established to assess the extent of forest damage and to monitor the rate and process of forest recovery. Canopy trees suffered the highest mortality particularly for...
Can magma-injection and groundwater forces cause massive landslides on Hawaiian volcanoes?
R.M. Iverson
1995, Journal of Volcanology and Geothermal Research (66) 295-308
Landslides with volumes exceeding 1000 km3 have occurred on the flanks of Hawaiian volcanoes. Because the flanks typically slope seaward no more than 12 °, the mechanics of slope failure are problematic. Limit-equilibrium analyses of wedge-shaped slices of the volcano flanks show that magma injection at prospective headscarps might trigger the...
Reproductive impairment in the Florida panther: Nature or nurture?
C.F. Facemire, T. S. Gross, L. J. Guillette
1995, Environmental Health Perspectives (103) 79-86
Many of the remaining members of the endangered Florida panther (Felis concolor coryi) population suffer from one or more of a variety of physiological, reproductive, endocrine, and immune system defects including congenital heart defects, abnormal sperm, low sperm density, cryptorchidism, thyroid dysfunction, and possible immunosuppression. Mercury contamination, determined to be...
Pathological and serum chemistry profiles of brown bullheads (Ameiurus nebulosus)
L.C. Folmar, J. Harshbarger, P. C. Baumann, G. Gardner, S. Bonomelli
1995, Bulletin of Environmental Contamination and Toxicology (54) 50-59
No abstract available....
A highly conserved N-terminal sequence for teleost vitellogenin with potential value to the biochemistry, molecular biology and pathology of vitellogenesis
L.D. Folmar, N. D. Denslow, R.A. Wallace, G. LaFleur, T. S. Gross, S. Bonomelli, C.V. Sullivan
1995, Journal of Fish Biology (46) 255-263
N-terminal amino acid sequences for vitellogenin (Vtg) from six species of teleost fish (striped bass, mummichog, pinfish, brown bullhead, medaka, yellow perch and the sturgeon) are compared with published N-terminal Vtg sequences for the lamprey, clawed frog and domestic chicken. Striped bass and mummichog had 100% identical amino acids between...
Basement and cover-rock deformation during Laramide contraction in the northern Madison Range (Montana) and its influence on Cenozoic basin formation
Karl S. Kellogg, C. J. Schmidt, S. W. Young
1995, American Association of Petroleum Geologists Bulletin (79) 1117-1137
Two major Laramide fault systems converge in the northwestern Madison Range: the northwest-striking, southwest-vergent Spanish Peaks reverse fault and the north-striking, east-vergent Hilgard thrust system. Analysis of foliation attitudes in basement gneiss north and south of the Spanish Peaks fault indicates that the basement in thrusted blocks of the Hilgard...
Growth and mortaility rates of larval American shad, Alosa sapidissima, at different salinities
K.E. Limburg, R. M. Ross
1995, Estuaries (18) 335-340
The tolerance of post yolk-sac American shad Alosa sapidissima larvae to salinities typically seen in estuaries was assessed experimentally. Sixteen-day-old Hudson River (experiment I) and 35-d-old Delaware River (experiment II) larvae were held for 8 d and 9 d respectively in low (0–1‰), medium (9–11‰), and highly (19–20‰) brackish water, and mortality...
Pb2+ and Zn2+ adsorption by a natural aluminum- and iron-bearing surface coating on an aquifer sand
J.A. Coston, C. C. Fuller, J.A. Davis
1995, Geochimica et Cosmochimica Acta (59) 3535-3547
Pb2+ and Zn2+ adsorption was studied in batch experiments with material collected from a shallow, unconfined aquifer of glacial outwash sand and gravel in Falmouth, Massachusetts, USA. The aquifer solids contain primarily quartz (95% w/w), with minor amounts of alkali feldspars and ferromagnetic minerals. Pb2+ and...
Formation and regression of the corpus luteum of the American alligator
L. J. Guillette, A.R. Woodward, Q. You-Xiang, M.C. Cox, J.H. Matter, T. S. Gross
1995, Journal of Morphology (224) 97-110
Luteal morphology of the American alligator is unique when compared to other reptiles but is similar to that of its phylogenetic relatives, the birds. The theca is extensively hypertrophied, but the granulosa never fills the cavity formed following the ovulation of the ovum. The formation of the corpus luteum (CL)...
