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...
The late Cenozoic diatom stratigraphy and paleolimnology of Tule Lake, Siskiyou Co. California
J.P. Bradbury
1991, Journal of Paleolimnology (6) 205-255
Lacustrine diatoms are diverse, well preserved and abundant in cores of lake sediment to 334 m depth near the town of Tulelake, Siskiyou County, northern California. The cores have been dated by radiometric, tephrochronologic and paleomagnetic techniques, which indicate a basal age of about 3 million years (Ma) and a...
In situ 10Be-26Al exposure ages at Meteor Crater, Arizona
K. Nishiizumi, C.P. Kohl, E.M. Shoemaker, J.R. Arnold, J. Klein, D. Fink, R. Middleton
1991, Geochimica et Cosmochimica Acta (55) 2699-2703
A new method of dating the surface exposure of rocks from in situ production of 10Be and 26Al has been applied to determine the age of Meteor Crater, Arizona. A lower bound on the crater age of 49,200 ± 1,700 years has been obtained by this...
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...
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...
New evidence on the hydrothermal system in Long Valley caldera, California, from wells, fluid sampling, electrical geophysics, and age determinations of hot-spring deposits
M.L. Sorey, G.A. Suemnicht, N.C. Sturchio, G.A. Nordquist
1991, Journal of Volcanology and Geothermal Research (48) 229-263
Data collected since 1985 from test drilling, fluid sampling, and geologic and geophysical investigations provide a clearer definition of the hydrothermal system in Long Valley caldera than was previously available. This information confirms the existence of high-temperature (> 200??C) reservoirs within the volcanic fill in parts of the west moat....
Suisun Marsh pintail study
M. R. Miller
1991, Report
No abstract available at this time...
Effects of parasitic castration on the salt marsh snail, Cerithidea californica
K. D. Lafferty
1991, Thesis
No abstract available at this time...
Status of the least Bell's vireo at the West San Luis Rey River, San Diego County, California, 1991
B.E. Kus
1991, Report
No abstract available at this time...
A FORTRAN program for interpretation of relative permeability from unsteady-state displacements with capillary pressure included
E.O. Udegbunam
1991, Computers & Geosciences (17) 1351-1357
This paper presents a FORTRAN program for the determination of two-phase relative permeabilities from unsteady-state displacement data with capillary pressure terms included. The interpretative model employed in this program combines the simultaneous solution of a variant of the fractional flow equation which includes a capillary pressure term and an integro-differential...
Low-flow and flow-duration characteristics of Mississippi streams
P. A. Telis
1991, Water-Resources Investigations Report 90-4087
No abstract available....
Monitoring grasshopper and locust habitats in Sahelian Africa using GIS and remote sensing technology
G. Gray Tappan, Donald G. Moore, Walter I. Knauseberger
1991, International Journal of Geographical Information Systems (5) 123-135
Development programmes in Sahelian Africa are beginning to use geographic information system (GIS) technology. One of the GIS and remote sensing programmes introduced to the region in the late 1980s was the use of seasonal vegetation maps made from satellite data to support grasshopper and locust control. Following serious outbreaks...
Aquatic fulvic acids in microbially based ecosystems: results from two desert lakes in Antarctica
Diane M. McKnight, G. R. Aiken, R. L. Smith
1991, Limnology and Oceanography (36) 998-1006
These lakes receive very limited input of organic material from the surrounding barren desert, but they sustain algal and bacterial populations under permanent ice cover. One lake has an extensive anoxic zone and high salinities; the other is oxic and has low salinities. Despite these differences, fulvic acids from both...
Estimating estuarine flushing and residence times in Charlotte Harbor, Florida, via salt balance and a box model
R. L. Miller, B. F. McPherson
1991, Limnology and Oceanography (36) 602-612
The new concept is that, over many tidal cycles, the tidally averaged "flow' (Qg) of water from the Gulf of Mexico, with a salinity of 35???, can be treated as a constant at any point in the estuary. This flow is used in a simple mixing equation to predict salinity...
Feather meal can displace fish meal aquaculture rations
S. Hughes
1991, Feedstuffs 11-13
Ecology of the island night lizard, Xantusia riversiana, on Santa Barbara Island, California
Gary M. Fellers, Charles A. Drost
1991, Herpetological Monographs (5) 28-78
We studied the population biology and ecology of the island night lizard (Xantusia riversiana) on Santa Barbara Island, California from 1981-1988. We trapped all the major habitats on the island, using pitfall traps and Sherman small mammal traps. In addition to permanently marking individuals by toe-clipping, we used specialized marking...
Evidence for color phase effects on the breeding and life history of Northern Fulmars
Scott A. Hatch
1991, The Condor (93) 409-417
About 15% of Northern Fulmars (Fulmarus glacialis) breeding on the Semidi Islands in 1979 had light-phase plumage; the remainder were dark. Fulmars of different plumage types mated indiscriminantly, but the lighter member of a mixed pair was more likely to be male than female. Pairs that included at least one...
Growth rate is negatively correlated with hatch date in Black Brant
James S. Sedinger, Paul L. Flint
1991, Ecology (72) 496-502
Arctic geese nest in a highly seasonal environment in which ungrazed plants reach peak nitrogen concentrations when goslings hatch (Sedinger and Raveling 1986). Grazing by geese prolongs peak nutrient concentrations but reduces food availability. This should cause nutrient availability to decline seasonally. Here, we test the hypothesis that late-hatching goslings...
Formation and transport of deethylatrazine in the soil and vadose zone
C.D. Adams, E.M. Thurman
1991, Journal of Environmental Quality (20) 540-547
Atrazine (2-chloro-4-ethylamino-6-isopropylamino-s-triazine) and two degradation products were monitored at seven depths in the soil and vadose zone throughout the growing season in two experimental plots in which corn (Zea mays L.) was grown. The soils in these plots were a Kimo silty clay loam (clayey over loamy, montmorillonitic, mesic, Fluvaquentic...
Mortality of seabirds in the Japanese land-based gillnet fishery for salmon
Anthony R. DeGange, Robert H. Day
1991, The Condor (93) 251-258
Mortality rates of seabirds in the Japanese land-based drift gillnet fishery for salmon were assessed from 413 gillnet sets made by Japanese research vessels in offshore areas used by the commercial fleet. Sixteen species of seabirds were recorded in nets. Shearwaters, primarily Short-tailed Shearwaters (Puffinus tenuirostris), and to a lesser...
Tumor frequencies in walleye (Stizostedion vitreum) and brown bullhead (Ictalurus nebulosus) and sediment contaminants in tributaries of the Laurentian Great Lakes
Paul C. Baumann, Michael J. Mac, Stephen B. Smith, John C. Harshbarger
1991, Canadian Journal of Fisheries and Aquatic Sciences (48) 1804-1810
To better characterize neoplasm epizootics in the Great Lakes basin and their association with families of contaminants, we sampled five locations: the Fox and Menominee rivers, Lake Michigan; Munuscong Lake, St. Mary's River; and the Black and Cuyahoga rivers, Lake Erie. Frequencies of external and liver tumors were determined for...
GIS technology benefits global change research
Norman B. Bliss
1991, GIS World (4) 55-58
No abstract available....
Mortality in tundra swans Cygnus columbianus
James C. Bartonek, J.R. Serie, K. A. Converse
1991, Wildfowl (42) 356-358
Our paper identifies and examines the significance of hunting and non-hunting mortality affecting the Eastern Population (EP) and Western Population (WP) (see Serie & Bartonek 1991a) of Tundra Swans. Sport hunting (Serie & Bartonek 1991b), native subsistence hunting (Copp 1989, Stewart & Bernier 1989), malicious shooting (McKelvey & MacNeill 1981),...
Capture myopathy in an endangered sandhill crane (Grus canadensis pulla)
J. W. Carpenter, Nancy Thomas, S. Reeves
1991, Journal of Zoo and Wildlife Medicine (22) 488-493
Despite precautions to protect cranes, a 3-year-old endangered Mississippi sandhill crane (Grus canadensis pulla) was found caught in a leghold trap in Gautier, Mississippi, on 11 November 1987. The bird could have been in the trap for up to 16 hr and was standing and struggling to escape when it...
Crustal subsidence, seismicity, and structure near Medicine Lake Volcano, California
D. Dzurisin, J.M. Donnelly-Nolan, J.R. Evans, S.R. Walter
1991, Journal of Geophysical Research (96)
The pattern of historical ground deformation, seismicity, and crustal structure near Medicine Lake volcano illustrates a close relation between magmatism and tectonism near the margin of the Cascade volcanic chain and the Basin and Range tectonic province. Between leveling surveys in 1954 and 1989 the...
