New seismic images of the cascadia subduction zone from cruise SO 108-ORWELL
E.R. Flueh, M. A. Fisher, J. Bialas, J.R. Childs, D. Klaeschen, Nina Kukowski, T. Parsons, D.W. Scholl, Uri S. ten Brink, A.M. Trehu, N. Vidal
1998, Tectonophysics (293) 69-84
In April and May 1996, a geophysical study of the Cascadia continental margin off Oregon and Washington was conducted aboard the German R/V Sonne. This cooperative experiment by GEOMAR and the USGS acquired wide-angle reflection and refraction seismic data, using ocean-bottom seismometers (OBS) and hydrophones (OBH), and multichannel seismic reflection...
Characterizing ground water flow in the municipal well fields of Cedar Rapids, Iowa, with selected environmental tracers
Robert A. Boyd
1998, Journal of the American Water Resources Association (34) 507-518
Cedar Rapids obtains its municipal water supply from a shallow alluvial aquifer along the Cedar River in east‐central Iowa. Water samples were collected and analyzed for selected isotopes and chlorofluorocarbons to characterize the ground‐water flow system near the municipal well fields. Analyses of deuterium and oxygen‐18 indicate that water in...
Palynology of latest Neogene (Middle Miocene to late Pliocene) strata in the Delmarva Peninsula of Maryland and Virginia
L. Sirkin, J. P. Owens
1998, Northeastern Geology and Environmental Sciences (20) 117-132
Palynology of Miocene and Pliocene formations in the Delmarva Peninsula of Maryland and Virginia reveals a significant representation of exotic pollen interspersed in pollen assemblages that are otherwise comparable to those from the modern vegetation of the Mid-Alantic coastal plain region. The late Tertiary arboreal pollen (AP) assemblages are dominated...
Source character of microseismicity in the San Francisco Bay block, California, and implications for seismic hazard
J. A. Olson, M.L. Zoback
1998, Bulletin of the Seismological Society of America (88) 543-555
We examine relocated seismicity within a 30-km-wide crustal block containing San Francisco Bay and bounded by two major right-lateral strike-slip fault systems, the Hayward and San Andreas faults, to determine seismicity distribution, source character, and possible relationship to proposed faults. Well-located low-level seismicity...
A new view into the Cascadia subduction zone and volcanic arc: Implications for earthquake hazards along the Washington margin
T. Parsons, A.M. Trehu, J.H. Luetgert, K. Miller, F. Kilbride, R.E. Wells, M. A. Fisher, E. Flueh, Uri S. ten Brink, N.I. Christensen
1998, Geology (26) 199-202
In light of suggestions that the Cascadia subduction margin may pose a significant seismic hazard for the highly populated Pacific Northwest region of the United States, the U.S. Geological Survey (USGS), the Research Center for Marine Geosciences (GEOMAR), and university collaborators collected and interpreted a 530-km-long wide-angle onshore-offshore seismic transect...
Glimpses of the Ice Age from I-81: Lee Ranger District
Water Resources Division, U.S. Geological Survey, U.S. Forest Service
1998, Report
Travelers on Interstate Highway 81 can see remnants of the Ice Age on the mountains between Strasburg and Harrisonburg, Virginia. Scattered along the miles of green, forested mountains are many gray patches without any forests. These treeless patches, or openings, in the steep mountain forests are block fields - geologic...
Movement patterns and the conservation of amphibians breeding in small, temporary wetlands
C.K. Dodd Jr., B.S. Cade
1998, Conservation Biology (12) 331-339
Many amphibians breed in water but live most of their lives in terrestrial habitats. Little is known, however, about the spatial distribution of these habitats or of the distances and directions amphibians move to reach breeding sites. The amphibian community at a small, temporary pond in northcentral Florida was monitored...
Chemistry of unsaturated zone gases sampled in open boreholes at the crest of Yucca Mountain, Nevada: Data and basic concepts of chemical and physical processes in the mountain
Donald C. Thorstenson, Edwin P. Weeks, Herbert Haas, Eurybiades Busenberg, Niel Plummer, Charles A. Peters
1998, Water Resources Research (34) 1507-1529
Boreholes open to the unsaturated zone at the crest of Yucca Mountain, Nevada, were variously sampled for CO2 (including 13C and 14C), CH4, N2, O2, Ar, CFC-11, CFC-12, and CFC-113 from 1986 to 1993. Air enters the mountain in outcrops, principally on the eastern slope, is enriched in CO2by mixing with soil gas,...
Degradation of chloroacetanilide herbicides: The prevalence of sulfonic and oxanilic acid metabolites in Iowa groundwaters and surface waters
Stephen J. Kalkhoff, Dana W. Kolpin, E.M. Thurman, I. Ferrer, D. Barcelo
1998, Environmental Science & Technology (32) 1738-1740
Water samples were collected from 88 municipal wells throughout Iowa during the summer and were collected monthly at 12 stream sites in eastern Iowa from March to December 1996 to study the occurrence of the sulfonic and oxanilic metabolites of acetochlor, alachlor, and metolachlor. The sulfonic and oxanilic metabolites were...
Coalbed methane resource potential and current prospects in Pennsylvania
A.K. Markowski
1998, International Journal of Coal Geology (38) 137-159
Coalbed methane gas content analyses from exploratory coal cores and existing data indicate that gas content generally increases with increasing depth and rank. The coal beds studied are from the Main Bituminous field of Pennsylvania (which currently contains 24 coalbed methane pools) and the Northern and Southern Anthracite coal fields....
Depth of the base of the Jackson aquifer, based on geophysical exploration, southern Jackson Hole, Wyoming, USA
Bernard T. Nolan, David L. Campbell, R. Michael Senterfit
1998, Hydrogeology Journal (6) 374-382
A geophysical survey was conducted to determine the depth of the base of the water-table aquifer in the southern part of Jackson Hole, Wyoming, USA. Audio-magnetotellurics (AMT) measurements at 77 sites in the study area yielded electrical-resistivity logs of the subsurface, and these were used to infer lithologic changes with...
Evidence for faulting related to dissociation of gas hydrate and release of methane off the southeastern United States
William P. Dillon, W. W. Danforth, D. R. Hutchinson, R.M. Drury, M.H. Taylor, J.S. Booth
1998, Geological Society Special Publication 293-302
This paper is part of the special publication Gas hydrates: relevance to world margin stability and climatic change (eds J.P. Henriet and J. Mienert). An irregular, faulted, collapse depression about 38 x 18 km in extent is located on the crest of the Blake Ridge offshore from the south- eastern...
The central and northern Appalachian Basin-a frontier region for coalbed methane development
P.C. Lyons
1998, International Journal of Coal Geology (38) 61-87
The Appalachian basin is the world's second largest coalbed-methane (CBM) producing basin. It has nearly 4000 wells with 1996 annual production at 147.8 billion cubic feet (Bcf). Cumulative CBM production is close to 0.9 trillion cubic feet (Tcf). The Black Warrior Basin of Alabama in the southern Appalachian basin (including...
Similar rates of decrease of persistent, hydrophobic and particle-reactive contaminants in riverine systems
Peter C. Van Metre, Jennifer T. Wilson, Edward Callender, Christopher C. Fuller
1998, Environmental Science & Technology (32) 3312-3317
Although it is well-known that concentrations of anthropogenic radionuclides and organochlorine compounds in aquatic systems have decreased since their widespread release has stopped in the United States, the magnitude and variability of rates of decrease are not well-known. Paleolimnological studies of reservoirs provide a tool for evaluating these long-term trends...
Geohistory and thermal maturation in the Cherokee Basin (Mid-Continent, U.S.A.): results from modeling
A. Forster, D. F. Merriam, P. Hoth
1998, American Association of Petroleum Geologists Bulletin (82) 1673-1693
The Cherokee basin in southeastern Kansas contains a stratigraphic section consisting mostly of Permian-Pennsylvanian alternating clastics and thin carbonates overlying carbonates of Mississippian and Cambrian-Ordovician age on a Precambrian crytalline basement. Based on a conceptual model of events of deposition, nondeposition, and erosion, a burial history model for (1) noncompaction,...
Soil relative dating of moraine and outwash-terrace sequences in the northern part of the upper Arkansas Valley, central Colorado, U.S.A.
Alan R. Nelson, Ralph R. Shroba
1998, Arctic and Alpine Research (30) 349-361
Profile development indices for soils developed in moraines and outwash near Twin Lakes and in outwash near Leadville support the correlation of moraines with subdued morphology and two high outwash terraces with the Bull Lake glaciation (ca. 130-160 ka) and the correlation of hummocky moraines and two low outwash terraces...
Water Resources Data, New York, Water Year 1997; Volume 1. Eastern New York; Excluding Long Island
Gerard K. Butch, Richard Lumia, Patricia M. Murray
1998, Water Data Report NY-97-1
Water resources data for the 1997 water year for New York consist of records of stage, discharge, and water quality of streams; stage, contents, and water quality of lakes and reservoirs; ground-water levels; and precipitation quality. This volume contains records for water discharge at 117 gaging stations; stage only at...
Hydrogeology and water quality of the Clinton Street-Ballpark Aquifer near Johnson City, New York
William F. Coon, Richard M. Yager, Jan M. Surface, Allan D. Randall, David A. Eckhardt
1998, Open-File Report 97-102
The Clinton Street-Ballpark aquifer, in the Susquehanna River valley in southern Broome County, N.Y., supplies drinking water to the Village of Johnson City near Binghamton. The hydrogeology and water quality of the aquifer were studied in 1994-95 to identify the source area of 1,1,1-trichloroethane, which was detected at the Johnson...
Level II scour analysis for Bridge 34 (WWINTH00370034) on Town Highway 37, crossing Mill Brook, West Windsor, Vermont
Erick M. Boehmler, Emily C. Wild
1998, Open-File Report 98-570
This report provides the results of a detailed Level II analysis of scour potential at structure WWINTH00370034 on Town Highway 37 crossing Mill Brook, West Windsor, Vermont (figures 1–8). A Level II study is a basic engineering analysis of the site, including a quantitative analysis of stream stability and scour...
Level II scour analysis for Bridge 22 (BRADTH00270022) on Town Highway 27, crossing the Waits River, Bradford, Vermont
Emily C. Wild, Michael A. Ivanoff
1998, Open-File Report 98-537
This report provides the results of a detailed Level II analysis of scour potential at structure BRADTH00270022 on Town Highway 27 crossing the Waits River, Bradford, Vermont (figures 1–8). A Level II study is a basic engineering analysis of the site, including a quantitative analysis of stream stability and scour...
Level II scour analysis for Bridge 33 (WWINTH00300033) on Town Highway 30, crossing Mill Brook, West Windsor, Vermont
Emily C. Wild, Robert H. Flynn
1998, Open-File Report 98-256
This report provides the results of a detailed Level II analysis of scour potential at structure WWINTH00300033 on Town Highway 30 crossing Mill Brook, West Windsor, Vermont (Figures 1–8). A Level II study is a basic engineering analysis of the site, including a quantitative analysis of stream stability and scour...
Effect of activities at the Idaho National Engineering and Environmental Laboratory on the water quality of the Snake River Plain aquifer in the Magic Valley study
Roy C. Bartholomay
1998, Fact Sheet 052-98
Radiochemical and chemical constituents in wastewater generated at facilities of the Idaho National Engineering and Environmental Laboratory (INEEL) (figure 1) have been discharged to waste-disposal ponds and wells since the early 1950 s. Public concern has been expressed that some of these constituents could migrate through the Snake River Plain...
Spatial and temporal variability of dissolved sulfate in Devils Lake, North Dakota, 1998
Bradley A. Sether, Aldo V. Vecchia, Wayne R. Berkas
1998, Fact Sheet 096-99
The Devils Lake Basin is a 3,810-squaremile closed subbasin of the Red River of the North Basin (fig. 1). About 3,320 square miles of the total 3,810 square miles is tributary to Devils Lake. The Devils Lake Basin contributes to the Red River of the North Basin when the level...
Aquatic habitats in relation to river flow in the Apalachicola River floodplain, Florida
Helen M. Light, Melanie R. Darst, J. W. Grubbs
1998, Professional Paper 1594
This study is part of a larger effort to identify fresh water needs throughout the region and develop a mechanism for basinwide water management. Quantitative estimates of the amount of aquatic habitat in the floodplain in relation to river flow are presented. Plates show streams, lakes, and floodplain forests connected...
A science-based, watershed strategy to support effective remediation of abandoned mine lands
Herbert T. Buxton, David A. Nimick, Paul Von Guerard, Stan E. Church, Ann G. Frazier, John R. Gray, Bruce R. Lipin, Sherman P. Marsh, Daniel F. Woodward, Briant A. Kimball, Susan E. Finger, Lee S. Ischinger, John C. Fordham, Martha S. Power, Christine M. Bunch, John W. Jones
1997, Conference Paper, Proceedings of the Fourth International Conference on Acid Rock Drainage, Vancouver, B.C., Canada, May 31-June 6, 1997
A U.S. Geological Survey Abandoned Mine Lands Initiative will develop a strategy for gathering and communicating the scientific information needed to formulate effective and cost-efficient remediation of abandoned mine lands. A watershed approach will identify, characterize, and remediate contaminated sites that have the most profound effect on water and ecosystem...
