The feeding habits of the snail kite in Florida, USA
P.W. Sykes Jr.
1987, Colonial Waterbirds (10) 84-92
The feeding habits of the Snail Kite (Rostrhamus sociabilis) were observed intermittently from 1967-1980 in Florida, USA. Approximately 97% of all observed foraging bouts were over marshes having sparse emergent vegetation. The visually-hunting kite was unable to forage over floating mats of exotic water hyacinth (Eichhornia crassipes). Male kites had...
Improving atlas methodology
C.S. Robbins, B.A. Dowell, J. O'Brien
1987, Acta Oecologica Oecologia Generalis (8) 314 (poste
We are studying a sample of Maryland (2 %) and New Hampshire (4 %) Atlas blocks and a small sample in Maine. These three States used different sampling methods and block sizes. We compare sampling techniques, roadside with off-road coverage, our coverage with that of the volunteers, and different methods...
Coincident seismic reflection/refraction studies of the continental lithosphere: A global review.
W. D. Mooney, T.M. Brocher
1987, Reviews of Geophysics (25) 723-742
Nearly 50 coincident seismic reflection/refraction studies to depths of at least the Moho provide an improved understanding of the continental lithosphere. Some conclusions include the following: (1) A transparent upper crust, a common observation on vertical reflection profiles, cannot generally be correlated with velocity gradients or low-velocity zones. Rather, a...
Effects on water quality due to flood-water detention by Barker and Addicks Reservoirs, Houston, Texas
Fred Liscum, R.L. Goss, E.M. Paul
1987, Water-Resources Investigations Report 86-4356
The Barker and Addicks Reservoirs, located about 16 miles west of Houston, Texas, provide flood-detention storage for storm runoff. Of interest are the water-quality characteristics in the study area and changes in water quality during detention. Study area sampling sites were selected upstream along Buffalo Bayou for Barker Reservoir and...
Ground-water resources of Jones County, Mississippi
E. H. Boswell, G.A. Bednar, Daphne Darden
1987, Water-Resources Investigations Report 85-4342
Jones County, Mississippi, is supplied with groundwater from aquifers in strata of Eocene and younger age. The largest groundwater withdrawals are from aquifers in the Catahoula Sandstone of the Miocene aquifer system that occur at depths of 200 and 400 ft in the Laurel area. Several public and industrial water...
Rare-earth-element compositions of Cenozoic volcanic rocks in the Southern Rocky Mountains and adjacent areas
Peter W. Lipman
1987, Bulletin 1668
The formation and failure of natural dams
J. E. Costa, R. L. Schuster
1987, Open-File Report 87-392
Of the numerous kinds of dams that form by natural processes, dams formed from landslides, glacial ice, and neoglacial moraines present the greatest threat to people and property. The most common types of mass movements that form landslide dams are rock and debris avalanches, rock and soil slumps and slides,...
Geochemical survey maps of the wildernesses and roadless areas in the White Mountains National Forest, Coos, Grafton, and Carroll counties, New Hampshire
F. C. Canney, F. H. Howd, J. A. Domenico, H.M. Nakagawa
1987, Miscellaneous Field Studies Map 1594-C
The Wilderness Act (Public Law 88-577, September 3, 1964) and related acts require the U.S. Geological Survey and the U.S. Bureau of Mines to survey certain areas on Federal lands to determine what mineral values, if any, may be present. Results must be made available to the public and be submitted...
Mineralogy and instrumental neutron activation analysis of seven National Bureau of Standards and three Instituto de Pesquisas Tecnologicas clay reference samples
John W. Hosterman, F.J. Flanagan, Anne Bragg, M. W. Doughten, R.H. Filby, Catherine Grimm, J. S. Mee, P.J. Potts, N.W. Rogers
1987, Circular 957
The concentrations of 3 oxides and 29 elements in 7 National Bureau of Standards (NBS) and 3 Instituto de Pesquisas Techno16gicas (IPT) reference clay samples were etermined by instrumental neutron activation analysis. The analytical work was designed to test the homogeneity of constituents in three new NBS reference clays, NBS-97b,...
Development of sinkholes resulting from man's activities in the Eastern United States
John G. Newton
1987, Circular 968
Development of induced sinkholes in carbonate terranes in the Eastern United States has resulted in costly damage and water pollution. Previously, detailed investigations of sinkholes were limited to Alabama and Missouri, with the most comprehensive being in Alabama. An investigation of the remainder of the area was made in 1981...
Geochemistry and preliminary assessment of resource potential for postorogenic granites of the southwestern Arabian Shield, Kingdom of Saudi Arabia
J. S. Stuckless, George VanTrump Jr., C. A. Bush, R. B. Vaughn, A.J. Bartel
1987, Open-File Report 87-509
Geochemical data for samples from 55 postorogenic plutons of the southwestern Arabian Shield show that these granitoids are generally less evolved than similar granitoids of the eastern Arabian Shield. Radioelement contents are low to normal relative to typical granitic rocks and uranium contents are distinctly low relative to rocks of...
Effects of coal strip mining on stream water quality and biology, southwestern Washington
L. A. Fuste, D. F. Meyer
1987, Water-Resources Investigations Report 86-4056
Strip mining for coal in southwestern Washington may be affecting the water quality of streams. To investigate these possible effects, five streams were selected for study of water quality in each of the two coal bearing areas: the Centralia-Chehalis coal district, and Kelso-Castle Rock coal area. In the Centralia-Chehalis coal...
Dinosaurs, pollen and spores, and the age of the Ojo Alamo Sandstone, San Juan Basin, New Mexico
James E. Fassett, S. G. Lucas, F.M. O’Neill
1987, GSA Special Papers (209) 17-34
The Ojo Alamo Sandstone of the San Juan Basin of New Mexico is composed of interbedded conglomeratic sandstone, sandstone, siltstone, and mudstone. Conglomerates are found in the western part of the basin; siliceous pebbles diminish in size both southward and eastward across the basin, becoming rare to nonexistent in the...
Copulation and mate guarding in the Northern Fulmar
Scott A. Hatch
1987, The Auk (104) 450-461
I studied the timing and frequency of copulation in mated pairs and the occurrence of extra-pair copulation (EPC) among Northern Fulmars (Fulmarus glacialis) for 2 yr. Copulation peaked 24 days before laying, a few days before females departed on a prelaying exodus of about 3 weeks. I estimated that females...
A Pennsylvanian-age terrestrial storm deposit: using plant fossils to characterize the history and process of sediment accumulation
C. Wnuk, H.W. Pfefferkorn
1987, Journal of Sedimentary Petrology (57) 212-221
A thin black shale overlying the B-coal underclay (in the Middle Pennsylvanian post-Pottsville strata of the Bernice Basin) contains a compression flora composed of large, prostrate, unidirectionally oriented lycopod trunks and randomly oriented pteridosperm stems. Analyses of modern log accumulations indicate that unidirectional...
The chemistry and mineralogy of haloed burrows in pelagic sediment at DOMES Site A: The equatorial North Pacific
D.Z. Piper, P.D. Rude, S. Monteith
1987, Marine Geology (74) 41-55
The chemical and mineralogical composition of burrowed sediment, recovered in 66 box cores at latitude 9°25′N and longitude 151°15′W in the equatorial Pacific, demonstrates the important role of infauna in determining the geochemistry of pelagic sediment. Haloed burrows, approximately 3 cm...
Bird behavior and mortality in relation to power lines in prairie habitats
C. A. Faanes
1987, Technical Report 7
Research was conducted to determine the magnitude of avian mortality caused by power transmission lines in prairie habitats during the two spring and two fall migration periods between July 1980 and May 1982. Searches for dead birds were made at least twice weekly during each migration period. Study sites were...
Source of lead and mineralizing brines for rossie-type Pb-Zn veins in the Frontenac axis area, New York ( USA).
Robert Ayuso, Nora K. Foley, C. Erwin Brown
1987, Economic Geology (82) 489-491
Veins composed mainly of calcite and some galena, sphalerite, fluorite, and other minerals are widespread in the Frontenac axis area of New York and Ontario. In New York, the veins (Fig. 1) occur mainly west and northwest of Gouverneur (Brown, 1983). The veins, mined in the 1800s for lead,...
Field observations of slush ice generated during freeze-up in arctic coastal waters
E. Reimnitz, E. W. Kempema
1987, Marine Geology (77) 219-231
In some years, large volumes of slush ice charged with sediment are generated from frazil crystals in the shallow Beaufort Sea during strong storms at the time of freeze-up. Such events terminate the navigation season, and because of accompanying hostile conditions,...
New perspectives on the eruption of 1912 in the valley of ten thousand smokes, Katmai National Park, Alaska
W. Hildreth
1987, Bulletin of Volcanology (49) 680-693
New data extend our understanding of the 1912 eruption, its backfilled vent complex at Novarupta, and magma-storage systems beneath adjacent stratovolcanoes. Initial Plinian rhyolite fallout is confined to a narrow downwind sector, and its maximum thickness may occur as far as 13 km from source. In contrast, the partly contemporaneous...
Geochemistry of the rare earth elements in ferromanganese nodules from DOMES Site A, northern equatorial Pacific
S.E. Calvert, D.Z. Piper, P. A. Baedecker
1987, Geochimica et Cosmochimica Acta (51) 2331-2338
The distribution of rare earth elements (REE) in ferromanganese nodules from DOMES Site A has been determined by instrumental neutron activation methods. The concentrations of the REE vary markedly. Low concentrations characterize samples from a depression (the valley), in which Quaternary sediments are thin or absent; high concentrations are found...
Gravity anomaly at a Pleistocene lake bed in NW Alaska interpreted by analogy with Greenland's Lake Taserssauq and its floating ice tongue
D.F. Barnes
1987, Journal of Geophysical Research Solid Earth (92) 8976-8984
A possible example of a very deep glacial excavation is provided by a distinctive gravity low located at the front of a valley glacier that once flowed into glacial Lake Aniuk (formerly Lake Noatak) in the western Brooks Range. Geologic and geophysical data suggest that sediments or ice filling a...
BOREHOLE NEUTRON ACTIVATION: THE RARE EARTHS.
J.L. Mikesell, F. E. Senftle
1987, IEEE Transactions on Nuclear Science (35)
Neutron-induced borehole gamma-ray spectroscopy has been widely used as a geophysical exploration technique by the petroleum industry, but its use for mineral exploration is not as common. Nuclear methods can be applied to mineral exploration, for determining stratigraphy and bed correlations, for mapping ore deposits, and for studying mineral concentration...
Geochemistry, mineralogy, and petrogenesis of basalt from the Gorda Ridge
A. S. Davis, D.A. Clague
1987, Journal of Geophysical Research Solid Earth (92) 10467-10483
Basalt pillow lava with glassy rims was dredged from 17 sites along the Gorda Ridge between latitudes 43°N and 40.8°N. All samples are low-K2O mid-ocean ridge tholeiitic basalt having a narrow compositional range with Mg numbers clustered around 60–62; more primitive and evolved compositions are present but rare. None of...
Magmatic history of Red Sea rifting: Perspective from the central Saudi Arabian coastal plain
J.S. Pallister
1987, Geological Society of America Bulletin (98) 400-417
A newly recognized Tertiary dike complex and comagmatic volcanic rocks exposed on the central Saudi Arabian coastal plain record early stages of magmatism related to Red Sea rifting. Intrusive and stratigraphic relationships and new potassium-argon dating indicate episodic magmatism from about 30 Ma to the present. Additional stratigraphic and radiometric...
