Technique for estimating magnitude and frequency of peak flows in Maryland
Jonathan J.A. Dillow
1996, Water-Resources Investigations Report 95-4154
Methods are presented for estimating peak-flow magnitudes of selected frequencies for drainage basins in Maryland. The methods were developed by generalized least-squares regression techniques using data from 219 streamflow-gaging stations in and near Maryland, and apply to peak flows with recurrence intervals of 2, 5, 10, 25, 50, 100, and...
Discharge, water-quality characteristics, and nutrient loads from McKay Bay, Delaney Creek, and East Bay, Tampa, Florida, 1991-1993
Y.E. Stoker, V.A. Levesque, E.M. Fritz
1996, Water-Resources Investigations Report 95-4167
Nutrient enrichment in Tampa Bay has caused a decline in water quality in the estuary. Efforts to reduce the nutrient loading to Tampa Bay have resulted in improvement in water quality from 1981 to 1991. However, Tampa Bay still is onsidered enriched with nutrients. Water quality in East Bay (located...
Hydrogeology and simulation of ground-water flow at the South Well Field, Columbus, Ohio
W. L. Cunningham, E. Scott Bair, W.P. Yost
1996, Water-Resources Investigations Report 95-4279
The City of Columbus, Ohio, operates four radial collector wells in southern Franklin County. The 'South Well Field' is completed in permeable outwash and ice-contact deposits, upon which flow the Scioto River and Big Walnut Creek. The wells are designed to yield approximately 42 million gallons per day; part of...
Axial structures within the Reelfoot Rift delineated with magnetotelluric surveys
B. D. Rodriguez, W. D. Stanley, J. M. Williams
1996, Professional Paper 1538-K
In the winter of 1811-12, three of the largest historic earthquakes in the United States occurred near New Madrid, Mo. 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...
Hydrogeology and simulation of ground-water flow in the alluvial aquifer at Louisville, Kentucky
M. A. Lyverse, J.J. Starn, M.D. Unthank
1996, Water-Resources Investigations Report 91-4035
The alluvial aquifer at Louisville, Ky., lies in a valley eroded by glacial meltwater that was later partly filled with outwash sand and gravel deposits. The aquifer is primarily unconfined, and the direction of flow is from the adjacent limestone and shale valley wall toward the Ohio River and major...
Soil, water, and streambed quality at a demolished asphalt plant, Fort Bragg, North Carolina, 1992-94
T.R. Campbell
1996, Water-Resources Investigations Report 95-4215
A number of potentially hazardous chemicals were used at an asphalt plant on the Fort Bragg U.S. Army Reservation near Fayetteville, North Carolina. This plant was demolished in the late 1960's. Samples collected from soil, ground water, surface water, and streambed sediment were tested for the presence of contaminants. The...
Possible continuous-type (unconventional) gas accumulation in the Lower Silurian "Clinton" sands, Medina Group and Tuscarora Sandstone in the Appalachian Basin; a progress report of the 1995 project activities
Robert T. Ryder, Kerry L. Aggen, Robert D. Hettinger, Ben E. Law, John J. Miller, Vito F. Nuccio, William J. Perry Jr., Stephen E. Prensky, John J. Filipo, Craig J. Wandrey
1996, Open-File Report 96-42
INTRODUCTION: In the U.S. Geological Survey's (USGS) 1995 National Assessment of United States oil and gas resources (Gautier and others, 1995), the Appalachian basin was estimated to have, at a mean value, about 61 trillion cubic feet (TCF) of recoverable gas in sandstone and shale reservoirs of Paleozoic age. Approximately...
Neogene and Quaternary geology of a stratigraphic test hole on Horn Island, Mississippi Sound
Gregory Gohn, G. L. Brewster-Wingard, Thomas M. Cronin, Lucy E. Edwards, T. G. Gibson, Meyer Rubin, Debra A. Willard
1996, Open-File Report 96-20-B
No abstract available....
Earthquakes and the southeastern boundary of the intact Iapetan margin in eastern North America
R. L. Wheeler
1996, Seismological Research Letters (67) 77-83
Earthquakes at three localities in eastern North America have been attributed on geological and seismological grounds to compressional reactivation of some of the late Proterozoic or early Paleozoic normal faults in the northeast-trending Iapetan passive margin. Assessment of seismic hazard can be aided by identifying the boundaries of the area...
Hydrogeologic framework of the North Carolina coastal plain
M. D. Winner Jr., R. W. Coble
1996, Professional Paper 1404-I
The hydrogeologic framework of the North Carolina Coastal Plain aquifer system consists of 10 aquifers separated by 9 confining units. From top to bottom, the aquifers are the surficial aquifer, Yorktown aquifer, Pungo River aquifer, Castle Hayne aquifer, Beaufort aquifer, Peedee aquifer, Black Creek aquifer, upper Cape Fear aquifer, lower...
Temporal changes in the configuration of the water table in the vicinity of the management systems evaluation area site, central Nebraska
John M. Kilpatrick
1996, Water-Resources Investigations Report 94-4173
To improve understanding of the hydrologic characteristics of the shallow aquifer in the vicinity of the Management Systems Evaluation Area site near Shelton, Nebraska, water levels were measured in approximately 130 observation wells in both June and September 1991. Two water-table maps and a water-level-change map were drawn on the...
Geohydrology and contamination at the Michigan Department of Transportation maintenance garage area, Kalamazoo County, Michigan
E. A. Lynch, G.C. Huffman
1996, Water-Resources Investigations Report 96-4010
A leaking underground storage tank was removed from the Michigan Department of Transportation maintenance garage area in Kalamazoo County., Mich., in 1985. The tank had been leaking unleaded gasoline. Although a remediation system was operational at the site for several years after the tank was removed, ground-water samples collected from...
Hydrology of the Wolf Branch sinkhole basin, Lake County, east-central Florida
D. M. Schiffer
1996, Open-File Report 96-143
A 4-year study of the hydrology of the Wolf Branch sinkhole basin in Lake County, Florida, was conducted from 1991-95 by the U.S. Geological Survey to provide information about the hydrologic characteristics of the drainage basin in the vicinity of Wolf Sink. Wolf Branch drains a 4.94 square mile area...
Hazards and climatic impact of subduction‐zone volcanism: A global and historical perspective
Robert I. Tilling
1996, Book chapter, Subduction: Top to Bottom
Subduction-zone volcanoes account for more than 80 percent of the documented eruptions in recorded history, even though volcanism--deep and, hence, unobserved--along the global oceanic ridge systems overwhelmingly dominates in eruptive output. Because subduction-zone eruptions can be highly explosive, they pose some of the greatest natural hazards to society if the...
Floods, runoff, and snowpack in Utah, 1995
D.V. Allen
1996, Fact Sheet 106-96
Utah, like other States in the western United States, has experienced several rapid and extreme changes between wet and dry precipitation cycles during recent years. During the 1995 water year (October 1994 to September 1995), most areas of Utah experienced greater-than-normal precipitation (1961-90), which was reflected in greater-than-average snowpack, moderate...
Hydrology of the Mississippi River valley alluvial aquifer, south-central United States
D. J. Ackerman
1996, Professional Paper 1416-D
Ground-water flow simulation indicates that pumpage from the aquifer since the early 1900's has caused a decrease in ground-water outflow to rivers, an increase in flow from rivers into the aquifer, and an increase in flow to the aquifer through the overlying confining unit. By the mid-1970's, rivers became a...
Summary of the Snake River plain Regional Aquifer-System Analysis in Idaho and eastern Oregon
G. F. Lindholm
1996, Professional Paper 1408-A
Regional aquifers underlying the 15,600-square-mile Snake River Plain in southern Idaho and eastern Oregon was studied as part of the U.S. Geological Survey's Regional Aquifer-System Analysis program. The largest and most productive aquifers in the Snake River Plain are composed of Quaternary basalt of the Snake River Group, which underlies...
Chemical evaluation of soil-solution in acid forest soils
G.B. Lawrence, Mark B. David
1996, Soil Science (161) 298-313
Soil-solution chemistry is commonly studied in forests through the use of soil lysimeters.This approach is impractical for regional survey studies, however, because lysimeter installation and operation is expensive and time consuming. To address these problems, a new technique was developed to compare soil-solution chemistry among red spruce stands in New...
Far-travelled Permian chert of the North Fork terrane, Klamath Mountains, California
Edward A. Mankinen, W. P. Irwin, C.D. Blome
1996, Tectonics (15) 314-328
Permian chert in the North Fork terrane and correlative rocks of the Klamath Mountains province has a remanent magnetization that is prefolding and presumably primary. Paleomagnetic results indicate that the chert formed at a paleolatitude of 8.6° ± 2.5° but in which hemisphere remains uncertain. This finding requires that these...
Hydrogeologic framework of the Great Basin region of Nevada, Utah, and adjacent states
R. W. Plume
1996, Professional Paper 1409-B
Regional aquifer systems in the Great Basin consist of carbonate-rock aquifers in the eastern Great Basin and basin-fill aquifers throughout the region. In the carbonate-rock aquifers, barriers to regional flow include Precambrian crystalline basement, upper Precambrian and Lower Cambrian clastic sedimentary rocks, and Jurassic to Tertiary granitic rocks. Basin-fill aquifers...
Crustal and upper mantle velocity structure of the Salton Trough, southeast California
T. Parsons, J. McCarthy
1996, Tectonics (15) 456-471
This paper presents data and modelling results from a crustal and upper mantle wide-angle seismic transect across the Salton Trough region in southeast California. The Salton Trough is a unique part of the Basin and Range province where mid-ocean ridge/transform spreading in the Gulf of California has evolved northward into...
Biomass patterns in seagrass meadows of the Laguna Madre, Texas
Christopher P. Onuf
1996, Bulletin of Marine Science (58) 404-420
The Laguna Madre of Texas supports the most extensive seagrass meadows in the western Gulf of Mexico, In 1988 seagrasses covered 730 km2 or about three-quarters of the embayment. Halodule wrightii dominated the entire upper laguna, and total biomass was quite uniform near 160 g˙m-2 throughout. Four species shared dominance in...
Mississippian stratigraphic framework of east-central California and southern Nevada with revision of Upper Devonian and Mississippian stratigraphic units in Inyo County, California
Calvin H. Stevens, Darrell S. Klingman, Charles A. Sandberg, Paul Stone, Paul Belasky, Forrest G. Poole, J. Kent Snow
1996, Bulletin 1988-J
No abstract available....
Large-scale right-slip displacement on the East San Francisco Bay region fault system, California: Implications for location of late Miocene to Pliocene Pacific plate boundary
R. J. McLaughlin, W.V. Sliter, D. H. Sorg, P.C. Russell, A.M. Sarna-Wojcicki
1996, Tectonics (15) 1-18
A belt of northwardly younging Neogene and Quaternary volcanic rocks and hydrothermal vein systems, together with a distinctive Cretaceous terrane of the Franciscan Complex (the Permanente terrane), exhibits about 160 to 170 km of cumulative dextral offset across faults of the East San Francisco Bay Region (ESFBR) fault system. The...
Organic geochemistry applied to environmental assessments of Prince William Sound, Alaska, after the Exxon Valdez oil spill—a review
A.E. Bence, Keith A. Kvenvolden, M.C. Kennicutt II
1996, Organic Geochemistry (24) 7-42
Organic geochemistry played a major role in the environmental assessments conducted following the Exxon Valdez oil spill, which occurred on March 24, 1989, and released about 258,000 bbls (41 million liters) of Alaska North Slope crude oil into Prince William Sound. Geochemical analyses of more than 15,000 sediment, tar, and biological samples...
