Geochronology of augen gneiss and related rocks, Yukon-Tanana terrane, east-central Alaska
John N. Aleinikoff, Cynthia Dusel-Bacon, Helen L. Foster
1986, Geological Society of America Bulletin (97) 626-637
Using several isotopic techniques, we have determined the ages of selected metamorphic rocks in the Yukon-Tanana terrane (YTT) of east-central Alaska. U-Pb zircon data from an augen gneiss body in the Big Delta quadrangle indicate that the granitoid protolith of the gneiss was intruded 341 ± 3 m.y. ago (lower...
A sublittoral population of Pleurophycus gardneri Setchell and Saunders 1900 (Phaeophyceae: Laminariaceae) in central California
Glenn R. VanBlaricom, Daniel C. Reed, Christopher Harrold, James L. Bodkin
1986, Bulletin of the Southern California Academy of Sciences (85) 120-122
Published distributional records for the stipitate kelp Pleurophycus gardneri Setchell and Saunders 1900 (Phaeophyceae: Laminariaceae) indicae a geographic range from Montague Island (59°58’N, 147°22W), Alaska to Fort Bragg (39°27’N, 123°47’W), California (Druehl 1969, 1970; Kjeldsen 1972). P. gardneri is found primarily in rocky intertidal and shallow subtidal locations (Scagel 1967;...
Migration of volcanism in the San Francisco volcanic field, Arizona
K. L. Tanaka, E.M. Shoemaker, G. E. Ulrich, E.W. Wolfe
1986, Geological Society of America Bulletin (97) 129-141
The remanent magnetization of volcanic rocks has been determined at 650 sites in the San Francisco volcanic field in the southern part of the Colorado Plateau. The polarity of remanent magnetization—combined with K-Ar age determinations, spatial and petrographic associations, stratigraphic relations, and state of preservation...
Influences of quaternary climatic changes on processes of soil development on desert loess deposits of the Cima volcanic field, California
L. D. McFadden, S. G. Wells, J. C. Dohrenwend
1986, Catena (13) 361-389
Soils formed in loess are evidence of both relict and buried landscapes developed on Pliocene-to-latest Pleistocene basalt flows of the Cima volcanic field in the eastern Mojave Desert, California. The characteristics of these soils change systematically and as functions of the age and surface morphology of the lava flow. Four...
Structure of the North American Atlantic Continental Margin
J. S. Schlee, K.K. Klitgord
1986, Journal of Geological Education (34) 72-89
The use of multichannel seismic-reflection profiles to study oceanic areas has advanced our understanding of deep crustal structure and the history of its development. Off eastern North America, where the structure of the continental margin is essentially constructional, seismic profiles have approximated geologic cross sections up to 10–15 km...
Hydrogeologic framework of the Floridan aquifer system in Florida and in parts of Georgia, Alabama, and South Carolina
James A. Miller
1986, Professional Paper 1403-B
The Floridan aquifer system of the Southeastern United States is comprised of a thick sequence of carbonate rocks that are mostly of Paleocene to early Miocene age and that are hydraulically connected in varying degrees. The aquifer system consists of a single vertically continuous permeable unit updip and of two...
Geochemical investigations of selected Eastern United States watersheds affected by acid deposition
Owen P. Bricker
1986, Journal of the Geological Society (143) 621-626
The effects of acid deposition on surface waters in eastern United States watersheds having similar size, physiography, climate and land use are related to the composition of the underlying bedrock. Watersheds developed on greenstone, calcareous shale, sandstone, granite, and schist differ in their ability to neutralize acid deposition....
Oil-source correlation study in northeastern Alaska
D.E. Anders, Leslie B. Magoon
1986, Organic Geochemistry (10) 407-415
The occurrence of numerous oil-stained outcrops across the coastal plain of the Arctic National Wildlife Refuge (ANWR) in northeastern Alaska indicates that commercial hydrocarbons could be present in the subsurface of this region. In addition, this region is flanked by two important oil provinces—the Prudhoe Bay area to the west...
EFFECTS OF ARTIFICIAL RECHARGE ON GROUND-WATER QUALITY, LONG ISLAND, NEW YORK.
Brian J. Schneider, Henry F. H. Ku, Edward T. Oaksford
1986, Conference Paper
Artificial-recharge experiments were conducted at East Meadow in central Nassau County, Long Island, N. Y. , from October 1982 through January 1984, to evaluate the degree of ground-water mounding and chemical effects of artificially replenishing the ground-water system with tertiary-treated wastewater. Reclaimed water was provided by the Cedar Creek wastewater-treatment...
Ground-water movement in the upper glacial aquifer in the Manorville area, Town of Brookhaven, Long Island, New York, in November 1983
D. A. Eckhardt, E. J. Wexler
1986, Water-Resources Investigations Report 85-4035
Water levels in 52 wells near the Manorville scavenger-waste disposal facility in the Town of Brookhaven were measured in November 1983 to determine the direction and gradients of groundwater flow in the upper glacial aquifer. Groundwater moves south-southeastward (S22 degrees E) from the groundwater divide, about 6 miles north of...
Coincidence and spatial variability of geology, soils, and vegetation, Mill Run watershed, Virginia
C.G. Olson, C.R. Hupp
1986, Earth Surface Processes and Landforms (11) 619-629
The Mill Run watershed is a structurally‐controlled synclinal basin on the eastern limb of the Massanutten Mountain complex of northwestern Virginia. Bedrock contacts are obscured by coarse sandstone debris from exposures near basin divides. Colluvium blankets more than half the basin, masking geomorphic surfaces, affecting vegetation...
Deglaciation of the mountainous region of northwestern Montana, U.S.A., as indicated by late Pleistocene ashes
P. E. Carrara, S. K. Short, R.E. Wilcox
1986, Arctic and Alpine Research (18) 317-325
During the late Wisconsin glaciation, the mountainous regions of northwestern Montana were covered by glacial ice. Marias Pass, on the Continental Divide immediately south of Glacier National Park, was covered by a local ice field. This ice and that from other glaciers to the north and south flowed eastward onto...
Winter ecology of bald eagles in southcentral Nebraska
G.R. Lingle, Gary L. Krapu
1986, Prairie Naturalist (18) 65-78
Approximately 200 bald eagles wintered along a 370-km section of the Platte and North Platte rivers in Nebraska during the winters of 1978-79 and 1979-80. A preponderance of the wintering eagles were adults, with the adult:subadult ratio highest during the harsh winter of 1978-79. Nocturnal roosts were located primarily in...
Aqueous geochemistry and diagenesis in the eastern Snake River Plain aquifer system, Idaho
Warren W. Wood, Walton H. Low
1986, Bulletin (97) 1456-1466
Water budget and isotopic analyses of water in the eastern Snake River Plain aquifer system confirm that most, if not all, of the water is local meteoric in origin. Solute mass-balance arguments suggest that ∼5 × 109 moles of calcite and 2.6 × 109 moles of silica are precipitated annually...
Correlation between electron spin resonance spectra and oil yield in eastern oil shales
M. Choudhury, K.F. Rheams, J.W. Harrell Jr.
1986, Fuel (65) 1028-1029
Organic free radical spin concentrations were measured in 60 raw oil shale samples from north Alabama and south Tennessee and compared with Fischer assays and uranium concentrations. No correlation was found between spin concentration and oil yield for the complete set of samples. However, for a 13 sample set taken...
Fission-track dating of the tectonic development of the San Juan Islands, Washington
S. Y. Johnson, R.A. Zimmerman, C. W. Naeser, J. T. Whetten
1986, Canadian Journal of Earth Sciences (23) 1318-1330
The San Juan Islands of Washington State form a geologically complex province located between the north Cascades, Vancouver Island, and the Olympic Peninsula. We have obtained 53 fission-track dates from the San Juan Islands province that help constrain its late Paleozoic to early Cenozoic tectonic and sedimentary history and its...
Precambrian basement geology of North and South Dakota
J. S. Klasner, E. R. King
1986, Canadian Journal of Earth Sciences (23) 1083-1102
Combined analysis of drill-hole, gravity, and magnetic data indicates that the buried Precambrian basement rocks of the Dakotas can be divided into several lithotectonic terranes. Eastern North Dakota and northeastern South Dakota are underlain by Archean gneiss. Except for the Black Hills region of South Dakota, where Archean rocks are...
Effects of the 1906 Earthquake on the Bald Hill Outlet System, San Mateo County, California
Earl H. Pampeyan
1986, Bulletin of the Association of Engineering Geologists (23) 197-208
Following the earthquake of April 18, 1906, it was discovered that a brick forebay and other parts of the reservoir outlet system were in the slip zone of the San Andreas fault. The original outlet through which water was directed to San Francisco consisted of two tunnels joined at the...
The Valley and Ridge Province of eastern Pennsylvania - Stratigraphic and sedimentologic contributions and problems
Jack B. Epstein
1986, Geological Journal (21) 283-306
Many contributions that have led to a better understanding of Appalachian geology have resulted directly from work in the folded Appalachian Mountain and Great Valley sections of the Valley and Ridge physiographic province of eastern Pennsylvania. Disagreements have been common since H.D. Rogers first described the geology of the area...
Sea cliff exposures of metamorphosed carbonate and schist, northern Seward Peninsula: A section in The United States Geological Survey in Alaska: Accomplishments during 1983
Julie A. Dumoulin, Alison B. Till
1985, Circular 945
Extensive seacliff exposures of marble, metadolostone, and schist occur on the north shore of Seward Peninsula in the Kotzebue A-1 and A-2 Quadrangles (fig. 12). Some of the exposed units have no analogs when compared to rocks mapped to the south in the Bendeleben and Solomon Quadrangles. Others are similar...
Preliminary description of a Miocene zone of structural complexity, Port Moller and Stepovak Bay quadrangles, Alaska: A section in The United States Geological Survey in Alaska: Accomplishments during 1983
Frederic H. Wilson, James E. Case, Robert L. Detterman
1985, Circular 945
A zone of structural disruption and complexity along the Pacific coast margin of the Alaska Peninsula (fig. 41) may be related to the Alaska Peninsula and the Chugach terrane boundary. The best exposure of this zone is located on the east shore of Humpback Bay (figs. 42, 43; also Burk,...
Seepage study of six canals in Salt Lake County, Utah, 1982-1983
L. R. Herbert, R.W. Cruff, K.M. Waddell
1985, Technical Publication 82
A study of selected reaches of the Utah and Salt Lake, Utah Lake Distributing, Provo Reservoir, Draper Irrigation, East Jordan, and Jordan and Salt Lake City Canals in Salt Lake County, Utah, was made to determine gains or losses of flow in those reaches. Three to five sets of seepage...
Metal contamination in wildlife living near two zinc smelters
W. N. Beyer, O. H. Pattee, L. Sileo, D. J. Hoffman, B.M. Mulhern
1985, Environmental Pollution (Series A) (38) 63-86
Wildlife in an oak forest on Blue Mountain was studied 10 km upwind (Bake Oven Knob site) and 2 km downwind (Palmerton site) of two zinc smelters in eastern Pennsylvania, USA. Previous studies at sites near these smelters had shown changes in populations of soil microflora, lichens, green plants and...
Accretion tectonics and crustal structure in Alaska
P.J. Coney, D. L. Jones
1985, Tectonophysics (119) 265-283
The entire width of the North American Cordillera in Alaska is made up of "suspect terranes". Pre-Late Cretaceous paleogeography is poorly constrained and the ultimate origins of the many fragments which make up the state are unclear. The Prince William and Chugach terranes accreted since Late Cretaceous time and represent...
Quaternary sedimentation of the Alaskan Beaufort shelf: Influence of regional tectonics, fluctuating sea levels, and glacial sediment sources
David A. Dinter
1985, Tectonophysics (114) 133-161
The offshore stratigraphy of the Quaternary Gubik Formation of Arctic Alaska has been studied on high-resolution seismic profiles with a maximum sub-seafloor penetration of about 100 m. In general, marine transgressive subunits of the Gubik Formation are wedge-shaped on the shelf, thickening slightly seaward to the shelf break, beyond which...
