A comparison of delta change and downscaled GCM scenarios for three mountainous basins in the United States
L.E. Hay, R.L. Wilby, G.H. Leavesley
2000, Journal of the American Water Resources Association (36) 387-397
Simulated daily precipitation, temperature, and runoff time series were compared in three mountainous basins in the United States: (1) the Animas River basin in Colorado, (2) the East Fork of the Carson River basin in Nevada and California, and (3) the Cle Elum River basin in Washington State. Two methods...
Arsenic in ground water of the United States: occurrence and geochemistry
Alan H. Welch, D.B. Westjohn, Dennis R. Helsel, Richard B. Wanty
2000, Ground Water (38) 589-604
Concentrations of naturally occurring arsenic in ground water vary regionally due to a combination of climate and geology. Although slightly less than half of 30,000 arsenic analyses of ground water in the United States were 1 μg/L, about 10% exceeded 10 μg/L....
Sedimentary record of the 1872 earthquake and "Tsunami" at Owens Lake, southeast California
J. P. Smoot, R. J. Litwin, J. L. Bischoff, S. J. Lund
2000, Sedimentary Geology (135) 241-254
In 1872, a magnitude 7.5-7.7 earthquake vertically offset the Owens Valley fault by more than a meter. An eyewitness reported a large wave on the surface of Owens Lake, presumably initiated by the earthquake. Physical evidence of this event is found in cores and trenches from Owens Lake, including soft-sediment...
Triggered surface slips in the Coachella Valley area associated with the 1992 Joshua Tree and Landers, California, Earthquakes
M. J. Rymer
2000, Bulletin of the Seismological Society of America (90) 832-848
The Coachella Valley area was strongly shaken by the 1992 Joshua Tree (23 April) and Landers (28 June) earthquakes, and both events caused triggered slip on active faults within the area. Triggered slip associated with the Joshua Tree earthquake was on a newly recognized fault, the East Wide Canyon fault,...
A volcano in North Carolina? A closer look at a tall tale
Susan E. Hough
2000, Seismological Research Letters (71) 704-705
The legacy of the 1811-1812 New Madrid, Central United States, earthquakes is one of tremendous enigma. We are left with just enough contemporary information to provide a measure of constraint on the isoseismal contours and therefore magnitudes of the three principal events (Nuttli, 1973; <a class="link...
Late Albian Kiowa-Skull Creek marine transgression, lower Dakota Formation, eastern margin of Western Interior Seaway, U.S.A
Richard L. Brenner, Greg A. Ludvigson, B.J. Witzke, A.N. Zawistoski, E.P. Kvale, R.L. Ravn, R. M. Joeckel
2000, Journal of Sedimentary Research (70) 868-878
An integrated geochemical-sedimentological project is studying the paleoclimatic and paleogeographic characteristics of the mid-Cretaceous greenhouse world of western North America. A critical part of this project, required to establish a temporal framework, is a stratigraphic study of depositional relationships between the Albian-Cenomanian Dakota and the Upper Albian Kiowa formations of...
Photographic evaluation of the impacts of bottom fishing on benthic epifauna
J.S. Collie, G.A. Escanero, P. C. Valentine
2000, ICES Journal of Marine Science (57) 987-1001
The gravel sediment habitat on the northern edge of Georges Bank (East coast of North America) is an important nursery area for juvenile fish, and the site of a productive scallop fishery. During two cruises to this area in 1994 we made photographic transects at sites of varying depths that...
Mesoproterozoic graphite deposits, New Jersey Highlands: Geologic and stable isotopic evidence for possible algal origins
R.A. Volkert, Craig A. Johnson, Albert V. Tamashausky
2000, Canadian Journal of Earth Sciences (37) 1665-1675
Graphite deposits of Mesoproterozoic age are locally abundant in the eastern New Jersey Highlands, where they are hosted by sulphidic biotite–quartz–feldspar gneiss, metaquartzite, and anatectic pegmatite. Gneiss and metaquartzite represent a shallow marine shelf sequence of locally organic-rich sand and mud. Graphite from massive deposits within metaquartzite yielded δ13C values...
A new ichnospecies of Nereites from carboniferous tidal-flat facies of eastern Kansas, USA: Implications for the Nereites-Neonereites debate
M.G. Mangano, L.A. Buatois, C.G. Maples, R.R. West
2000, Journal of Paleontology (74) 149-157
Predominantly horizontal, gently curved to slightly sinuous traces constituting uniserial rows of imbricated, subspherical sediment pads occur in Pennsylvanian tidal-flat facies of eastern Kansas. These traces exhibit a complex, actively filled internal structure. The presence of a median tunnel enveloped by overlapping pads of reworked sediment indicates that these biogenic...
Correlation of 1- to 10-Hz earthquake resonances with surface measurements of S-wave reflections and refractions in the upper 50 m
R. A. Williams, W. J. Stephenson, A.D. Frankel, E. Cranswick, M. E. Meremonte, J. K. Odum
2000, Bulletin of the Seismological Society of America (90) 1323-1331
Resonances observed in earthquake seismograms recorded in Seattle, Washington, the central United States and Sherman Oaks, California, are correlated with each site's respective near-surface seismic velocity profile and reflectivity determined from shallow seismic-reflection/refraction surveys. In all of these cases the resonance accounts for the highest amplitude shaking at the site...
Ecosystem responses to nitrogen deposition in the Colorado Front Range
Jill Baron, H.M. Rueth, A.M. Wolfe, K. R. Nydick, E.J. Allstott, J.T. Minear, B. Moraska
2000, Ecosystems (3) 352-368
We asked whether 3–5 kg N y−1 atmospheric N deposition was sufficient to have influenced natural, otherwise undisturbed, terrestrial and aquatic ecosystems of the Colorado Front Range by comparing ecosystem processes and properties east and west of the Continental Divide. The eastern side receives elevated N deposition from urban, agricultural,...
The mountain that moved: geologic wonders of the George Washington and Jefferson National Forests
Water Resources Division, U.S. Geological Survey, U.S. Forest Service
2000, Report
Prehistoric, giant landslides in Montgomery and Craig Counties, Va., in the Blacksburg/Wythe Ranger Districts of the Jefferson National Forest, are the largest known landslides in eastern North America and are among the largest in the world. One of the landslides is more than 3 miles long! The ancient, giant landslides...
Geology in the 1996 USGS seismic-hazard maps, central and eastern United States
R. L. Wheeler, A. Frankel
2000, Seismological Research Letters (71) 273-282
The current (1996) national probabilistic seismic-hazard maps utilize information about geologic structure and tectonics of the central and eastern U.S. to compensate for uncertainty that arises from the short seismicity record. Geology was incorporated into the maps mainly as seven source zones that are delineated in three distinct ways. The...
Bed material transport in the Virgin River, Utah
E.D. Andrews
2000, Water Resources Research (36) 585-596
Detailed information concerning the rate and particle size distribution of bed material transport by streamflows can be very difficult and expensive to obtain, especially where peak streamflows are brief and bed material is poorly sorted, including some very large boulders. Such streams, however, are common in steep, arid watersheds. Any...
Growth and invasive potential of Sapium sebiferum (Euphorbiaceae) within the coastal prairie region: the effects of soil and moisture regime
T.C. Barrilleaux, J.B. Grace
2000, American Journal of Botany (87) 1099-1106
The introduced tree Sapium sebiferum (Euphorbiaceae) is considered a serious threat to the preservation of the coastal prairie region of Louisiana and Texas, although it is currently uncommon in the western part of the region. The objective of this study was to evaluate the potential effects of location, soils, and...
Atmospheric nitrogen in the Mississippi River Basin: Amissions, deposition and transport
G.B. Lawrence, D. A. Goolsby, W.A. Battaglin, G.J. Stensland
2000, Science of Total Environment (248) 87-100
Atmospheric deposition of nitrogen has been cited as a major factor in the nitrogen saturation of forests in the north-eastern United States and as a contributor to the eutrophication of coastal waters, including the Gulf of Mexico near the mouth of the Mississippi River. Sources of nitrogen emissions and the...
Facies patterns and conodont biogeography in Arctic Alaska and the Canadian Arctic Islands: Evidence against juxtaposition of these areas during early Paleozoic time
Julie A. Dumoulin, A. G. Harris, D. C. Bradley, T. A. De Freitas
2000, Polarforschung (68) 257-266
Differences in lithofacies and biofacies suggest that lower Paleozoic rocks now exposed in Arctic Alaska and the Canadian Arctic Islands did not form as part of a single depositional system. Lithologic contrasts are noted in shallow- and deep-water strata and are especially marked in Ordovician and Silurian rocks. A widespread...
Lava bubble-wall fragments formed by submarine hydrovolcanic explosions on Lō'ihi Seamount and Kīlauea Volcano
D.A. Clague, A. S. Davis, J. L. Bischoff, J.E. Dixon, R. Geyer
2000, Bulletin of Volcanology (61) 437-449
Glassy bubble-wall fragments, morphologically similar to littoral limu o Pele, have been found in volcanic sands erupted on Lō'ihi Seamount and along the submarine east rift zone of Kīlauea Volcano. The limu o Pele fragments are undegassed with respect to H2O and S and formed by mild steam explosions. Angular...
First record of Daphnia lumholtzi Sars in the Great Lakes
Christopher J. Muzinic
2000, Journal of Great Lakes Research (26) 352-354
Adults of the cladoceran Daphnia lumholtzi, native to Australia, Africa, and parts of Asia, were first collected in August 1999 in Lake Erie. Individuals were collected near East Harbor State Park, Lakeside, Ohio from vertical plankton net tows. The average number of D. lumholtzi that were found (0.03/L) indicate that D. lumholtzi is beginning to...
Molecular genetic status of Aleutian Canada Geese from Buldir and the Semidi Islands, Alaska
Barbara J. Pierson, John M. Pearce, Sandra L. Talbot, Gerald F. Shields, Kim T. Scribner
2000, The Condor (102) 172-180
We conducted genetic analyses of Aleutian Canada Geese (Branta canadensis leucopareia) from Buldir Island in the western Aleutians and the Semidi Islands in the eastern portion of their breeding range. We compared data from seven microsatellite DNA loci and 143 base pairs of the control region of mitochondrial DNA from...
Effects of management practices on grassland birds: Eastern Meadowlark
Scott D. Hull
2000, Report
Information on the habitat requirements and effects of habitat management on grassland birds were summarized from information in more than 4,000 published and unpublished papers. A range map is provided to indicate the relative densities of the species in North America, based on Breeding Bird Survey (BBS) data. Although birds...
Diagenesis and reservoir quality of the Upper Mississippian Aux Vases Sandstone, Illinois Basin
Janet K. Pitman, Mitchell E. Henry, Hannes E. Leetaru
2000, Professional Paper 1609
Conventional reservoir quality data for more than 300 wells provided by the Illinois and Indiana state geological surveys were analyzed to determine the factors governing porosity and permeability in the Upper Mississippian Aux Vases Sandstone, an important hydrocarbon-producing unit in the Illinois Basin. In addition, approximately 150 samples of the...
Are North Slope surface alluvial fans pre-Holocene relicts?
Erk Reimnitz, Stephen C. Wolf
2000, Professional Paper 1605
The surface morphology of the northern slope of the Brooks Range (North Slope) from the Canning River, Alaska, eastward is dominated by a series of large alluvial fans and braided streams floored by coarse alluvium. On the basis of our studies, we conclude that the fans are not prograding now...
Fish communities and their relation to environmental factors in the eastern Iowa basins in Iowa and Minnesota, 1996
Daniel J. Sullivan
2000, Water-Resources Investigations Report 2000-4194
Fish community data were collected by the U.S. Geological Survey (USGS) at 12 sites in 1996 in the Wapsipinicon, the Cedar, the Iowa, and the Skunk River Basins in eastern Iowa. The study was done as part of the National Water-Quality Assessment (NAWQA) Program of the USGS. This report presents an...
Simulation of the recharge area for Frederick Springs, Dane County, Wisconsin
R. J. Hunt, J. J. Steuer
2000, Water-Resources Investigations Report 2000-4172
The Pheasant Branch watershed in Dane County is expected to undergo development. There are concerns that this development will adversely affect water resources, including Frederick Springs, a large spring complex in the watershed. The spring's recharge area was delineated using a telescopic mesh refinement (TMR) model constructed from an existing...
