Reconnaissance investigation of water quality, bottom sediment, and biota associated with irrigation drainage in the Owyhee and Vale Projects, Oregon and Idaho, 1990-91
F. A. Rinella, W.H. Mullins, C.A. Schuler
1994, Water-Resources Investigations Report 93-4156
A reconnaissance investigation was conducted during 1990--91 in the Owyhee and Vale projects in eastern Oregon and southwestern Idaho, as well as at a number of sites in the Snake River and tributaries to the Snake River in the area of study. The objective of the study was to determine...
Altitude and configuration of the potentiometric surface, May and June 1993, and change in water level 1983-93, in the carbonate rocks in part of East Whiteland and Charlestown Townships, Chester County, Pennsylvania
B. C. McManus, R. A. Sloto
1994, Open-File Report 93-659
A map showing ground-water levels in the carbonate rocks of northern Chester County, Pa., was constructed on the basis of water levels in 51 wells measured in May and June 1993. The area studied underlies parts of East Whiteland and Charlestown Townships. Water-level altitudes range from about 413 feet above...
Bibliography of selected water-resources information for the Arkansas River basin in Colorado through 1985
John M. Kuzmiak, Hyla H. Strickland
1994, Open-File Report 94-331
The Arkansas River basin composes most of southeastern Colorado, and the numerous population centers and vast areas of agricultural development are located primarily in the semiarid part of the basin east of the Continental Divide. Because effective management and development of water resources in this semiarid area are essential...
Preliminary bedrock geologic map of parts of the Lower Waterford, Concord, Littleton, and Miles Pond 7 1/2-minute quadrangles, Vermont and New Hampshire
Douglas W. Rankin
1994, Open-File Report 94-410
The map area, in east-central Vermont and adjacent New Hampshire, consists of parts of the Lower Waterford, Concord, Littleton and Miles Pond 7 1/2-minute quadrangles (Fig. 1) that together constitute the Littleton 15-minute quadrangle. The mapping is part of the effort to produce a new bedrock geologic map of Vermont...
A search for paleoliquefaction and evidence bearing on the recurrence behavior of the great 1811-12 New Madrid earthquakes
S.G. Wesnousky, L.M. Leffler
1994, Professional Paper 1538-H
In the winter of 1811-12, three of the largest historic earthquakes in the United States occurred near New Madrid, Missouri. Seismicity continues to the present day throughout a tightly clustered pattern of epicenters centered on the bootheel of Missouri, including parts of northeastern Arkansas, northwestern Tennessee, western Kentucky, and southern...
Maps showing the thickness and character of Quaternary sediments in the glaciated United States east of the Rocky Mountains-northern plains states (west of 102 degrees west longitude)
D. R. Soller
1994, IMAP 1970-D
Potentiometric surface of the middle Potomac Aquifer in Virginia, 1993
E. C. Hammond, E. R. McFarland, M. J. Focazio
1994, Open-File Report 94-372
Ground-water level measurements from 50 wells in the middle Potomac aquifer in the Coastal Plain Physiographic Province of Virginia in 1993 were used to prepare a map of the potentiometric surface of the aquifer. The map shows the potentiometric surface of the middle Potomac aquifer sharply declining eastward from nearly...
Evidence of contemporary and ancient excess fluid pressure in the New Madrid seismic zone of the Reelfoot Rift, central United States
F. A. McKeown, S. Diehl
1994, Professional Paper 1538-N
In the winter of 1811-12, three of the largest historic earthquakes in the United States occurred near New Madrid, Missouri. Seismicity continues to the present day throughout a tightly clustered pattern of epicenters centered on the bootheel of Missouri, including parts of northeastern Arkansas, northwestern Tennessee, western Kentucky, and southern...
Sedimentary patterns across the Paleocene-Eocene boundary in the Atlantic and Gulf Coastal Plains of the United States
Thomas G. Gibson, Laurel M. Bybell
1994, Bulletin - Societe Belge de Geologie (103) 237-265
Fossiliferous clay and sand belonging to calcareous nannofossil Zones NP 9 (latest Paleocene) and NP 10 (earliest Eocene) are widespread in the US Gulf and Atlantic Coastal Plains. Although the thickness of Zone NP 9-NP 10 strata is several times greater in the eastern Gulf Coastal Plain than in the...
Environmental geology of Warren County, New Jersey; bedrock geology
Richard A. Volkert, Gregory C. Herman, Avery A. Drake Jr., Jack B. Epstein, Richard F. Dalton, Donald H. Monteverde
1994, Open File Map 15A
No abstract available....
Analysis of the surface hydrology in a regional climate model
F. Giorgi, Steven W. Hostetler, Christine Shields Brodeur
1994, Quarterly Journal of the Royal Meteorological Society (120) 161-183
This paper discusses the surface hydrology of a multi‐year simulation of present day climate over the United States (US) conducted with a regional climate model (RegCM) nested within a general circulation model (GCM). The RegCM, which is run with a 60 km gridpoint spacing is interactively coupled with a state‐of‐the‐art...
Long-period earthquakes in the Long Valley Caldera Region, eastern California
Andrew M. Pitt, David P. Hill
1994, Geophysical Research Letters (21) 1679-1682
Most earthquakes occurring near Long Valley caldera since the onset of recurring swarm activity in 1980 have the broad-band signature typical of tectonic or volcano-tectonic earthquakes with impulsive, high-frequency P and S waves. With the Mammoth Mountain earthquake swarm in mid 1989, we began detecting occasional events with a marked...
GPS measured rates of deformation in the northern San Francisco Bay Region, California, 1990–1993
S. D. P. Williams, Jerry L. Svarc, Michael Lisowski, W.H. Prescott
1994, Geophysical Research Letters (21) 1511-1514
A 100-km-long, 13-station profile extending across the San Andreas fault system north of San Francisco Bay was measured 7 times between March 1990 and January 1993 with the Global Positioning System (GPS). The data have been processed using the Bernese Version 3.2 software. Data from a continental-scale fiducial network were...
Mourning dove population trend estimates from Call-Count and North American Breeding Bird Surveys
John R. Sauer, David D. Dolton, Sam Droege
1994, Journal of Wildlife Management (58) 506-515
The mourning dove (Zenaida macroura) Call-count Survey and the North American Breeding Bird Survey provide information on population trends of mourning doves throughout the continental United States. Because surveys are an integral part of the development of hunting regulations, a need exists to determine which survey provides precise information. We...
Climate, soil water storage, and the average annual water balance
P. C. D. Milly
1994, Water Resources Research (30) 2143-2156
This paper describes the development and testing of the hypothesis that the long-term water balance is determined only by the local interaction of fluctuating water supply (precipitation) and demand (potential evapotranspiration), mediated by water storage in the soil. Adoption of this hypothesis, together with idealized representations of relevant input variabilities...
Preliminary U-series disequilibrium and thermoluminescence ages of surficial deposits and paleosols associated with Quaternary faults, eastern Yucca Mountain
James B. Paces, Christopher M. Menges, B. Wildmann, J. R. Wesling, Charles A. Bush, Kiyoto Futa, H. T. Millard, P. B. Maat, John W. Whitney
1994, Conference Paper, High Level Radioactive Waste Management 1994
No abstract available....
Hydrogeology, simulation of regional ground-water flow, and saltwater intrusion, Potomac-Raritan-Magothy Aquifer System, Northern Coastal Plain of New Jersey
Amleto A. Pucci Jr., Daryll A. Pope, JoAnn M. Gronberg
1994, New Jersey Geological Survey Report 36
The Potomac-Raritan-Magothy aquifer system in Middlesex and Monmouth Counties in the northern Coastal Plain of New Jersey consists primarily of unconsolidated Cretaceous sediments, which are divided into the upper and middle aquifers and confining units. These units, which strike northeastsouthwest along the Fall Line, dip and thicken to the southeast....
Petrogenesis of the highly potassic 1.42 Ga Barrel Spring pluton, southeastern California, with implications for mid-Proterozoic magma genesis in the southwestern USA
James D. Gleason, Calvin F. Miller, J. L. Wooden, Victoria C. Bennett
I. S. E. Carmichael, editor(s)
1994, Contributions to Mineralogy and Petrology (118) 182-197
Syenites from the Barrel Spring pluton were emplaced in the Early Proterozoic Mojave crustal provine of southeastern California at 1.42 Ga. All rocks, even the most mafic, are highly enriched in incompatible elements (e.g. K2O 4–12 wt%, Rb 170–370 ppm, Th 12–120 ppm, La 350–1500xchondrite, La/Ybn 35–100)....
Triggered seismicity and deformation between the Landers, California, and Little Skull Mountain, Nevada, earthquakes
Paul Bodin, Joan Gomberg
1994, Bulletin of the Seismological Society of America (84) 835-843
This article presents evidence for the channeling of strain energy released by the Ms = 7.4 Landers, California, earthquake within the eastern California shear zone (ECSZ). We document an increase in seismicity levels during the 22-hr period starting with the Landers earthquake and culminating 22 hr later with the...
Shear zones formed along long, straight traces of fault zones during the 28 June 1992 Landers, California, earthquake
Arvid M. Johnson, Robert W. Fleming, Kenneth M. Cruikshank
1994, Bulletin of the Seismological Society of America (84) 499-510
Surface rupturing during the 28 June 1992 Landers, California, earthquake, east of Los Angeles, accommodated right-lateral offsets up to about 6 m along segments of distinct, en-echelon fault zones with a total length of 80 km. The offsets were accommodated generally not by faults—distinct slip surfaces—but rather by shear zones,...
Dating of shallow groundwater: Comparison of the transient tracers 3H/3He, chlorofluorocarbons, and 85Kr
Brenda Ekwurzel, Peter Schlosser, William M. Smethie Jr., Niel Plummer, Eurybiades Busenberg, Robert L. Michel, Ralf Weppernig, Martin Stute
1994, Water Resources Research (30) 1693-1708
This paper describes a direct comparison of apparent ages derived from 3H/3He, chlorofluorocarbons (CCl3F and CCl2F2), and 85Kr measurements in shallow groundwater. Wells chosen for this study are completed in the unconfined surficial aquifers in late Cenozoic Atlantic Coastal Plain sediments of the Delmarva Peninsula, on the east coast of the United...
Earthquake refraction profiles of the root of the Sierra Nevada
Martha K. Savage, Li Li, Jerry P. Eaton, Craig H. Jones, James N. Brune
1994, Tectonics (13) 803-817
We examine the seismic structure of the Sierra Nevada using records of nine earthquakes and one explosion in and near the Sierra, recorded on stations in the Sierra. We first interpret travel times from these paths, which are confined to a single tectonic block, in terms of...
The volcanic, sedimentologic, and paleolimnologic history of the Crater Lake caldera floor, Oregon:Evidence for small caldera evolution
C. Hans Nelson, Charles R. Bacon, Stephen W. Robinson, David P. Adam, J. Platt Bradbury, John H. Barber Jr., Deborah Schwartz, Ginger Vagenas
1994, Bulletin (106) 684-704
Apparent phreatic explosion craters, caldera-floor volcanic cones, and geothermal features outline a ring fracture zone along which Mount Mazama collapsed to form the Crater Lake caldera during its climactic eruption about 6,850 yr B.P. Within a few years, subaerial deposits infilled the phreatic craters and then formed a thick...
A seismotectonic model for the 300-kilometer-long eastern Tennessee seismic zone
C.A. Powell, G. A. Bollinger, M.C. Chapman, M.S. Sibol, A. C. Johnston, R. L. Wheeler
1994, Science (264) 686-688
Ten years of monitoring microearthquakes with a regional seismic network has revealed the presence of a well-defined, linear zone of seismic activity in eastern Tennessee. This zone produced the second highest release of seismic strain energy in the United States east of the Rocky Mountains during the last decade, when...
Conflicting tectonics? Contraction and extension at middle and upper crustal levels along the Cordilleran Late Jurassic arc, southeastern California
Mark J. Davis, Daniel L. Farber, Joe L. Wooden, J. Lawford Anderson
1994, Geology (22) 247-250
Effects of mid-Mesozoic contraction followed closely in time by extension are present in mid- to upper-crustal plutonic rocks in the Chuckwalla Mountains of the eastern Transverse Ranges, California. Late Jurassic movement along a steeply dipping, right-lateral mylonitic shear zone is bracketed between 159 and 147 Ma via U-Pb dated plutons....
