Cooperative federal-state liming research on surface waters impacted by acidic deposition
R.K. Schreiber
1988, Water, Air, & Soil Pollution (41) 53-73
In the eastern and north-central United States, lakes and streams with low acid neutralizing capacity are at risk from acidity. Resource management agencies are interested in developing mitigation strategies that protect or restore fisheries in these waters. Addition of limestone (calcium carbonate) to improve water quality...
Stratigraphic evidence of Holocene faulting in the mid-continent: The Meers fault, southwestern Oklahoma
Richard F. Madole
1988, GSA Bulletin (100) 392-401
Stratigraphic relations and ten 14C ages show that movement occurred on the Meers fault in late Holocene time. Movement on the fault postdates the Browns Creek Alluvium, which began to be deposited between 14,000 and 13,000 yr B.P., and predates the East Cache Alluvium, which was deposited between 800 and 100...
Voluminous submarine lava flows from Hawaiian volcanoes
Robin T. Holcomb, James G. Moore, Peter W. Lipman, R.H. Belderson
1988, Geology (16) 400-404
The GLORIA long-range sonar imaging system has revealed fields of large lava flows in the Hawaiian Trough east and south of Hawaii in water as deep as 5.5 km. Flows in the most extensive field (110 km long) have erupted from the deep submarine segment of Kilauea's east rift zone....
Deformation along the northeast side of Blacktail Mountains salient, southwestern Montana
Russell G. Tysdal
1988, GSA Memoirs (171) 203-215
The Blacktail Mountains salient is a convex-eastward area of stacked Laramide-age thrust faults that trend north and dip west at moderate angles. The thrusts occur in Mississippian to Cretaceous strata above a basement of Archean metamorphic rocks. The northern margin of the salient is delimited by the Jake Canyon fault,...
Changes in the morphometry of Las Vegas Wash and the impact on water quality
Richard A. Roline, James J. Sartoris
1988, Lake and Reservoir Management (4) 135-142
Las Vegas Wash, a natural wash east of Las Vegas, Nevada, carries stormwater, groundwater drainage, and sewage effluent from two sewage treatment plants to Lake Mean. Over 80 percent of the normal discharge of approximately 3.4 m3/s (120 ft3/s) consists of effluent from the City of Las Vegas and...
Estimation of ground-water use for irrigation in eastern Washington using Landsat imagery
Peter C. Van Metre, P. M. Seevers
1988, Conference Paper, Proceedings of the Symposium on Water-Use Data for Water Resources Management
No abstract available....
Paleomagnetic results from the Shasta Bally Plutonic Belt in the Klamath Mountains Province, northern California
Edward A. Mankinen, William P. Irwin, C. Sherman Gromme
1988, Geophysical Research Letters (15) 56-59
Available paleomagnetic data show approximately 100° of clockwise rotation for Permian and Triassic strata of the Eastern Klamath terrane. Jurassic strata of this terrane are rotated approximately 60° clockwise, which is comparable to rotations reported for Jurassic plutons that occur elsewhere in the Klamath Mountains province. Paleomagnetic data obtained during...
What is worse than the “big one”?
R. A. Kerr
1988, Earthquakes & Volcanoes (USGS) (20) 213-218
The Whittier Narrows California earthquake sequence (local magnitude, Ml=5.9 or 1 October, 1987), which caused over $358 million damage, indicates that assessments of earthquake hazards in Los Angeles metropolitan area may be underestimated. the sequence ruptured a previously unidentified thrust fault that may be part of a large system of...
The northeastern Ohio earthquake of 31 January 1986: Was it induced?
C. Nicholson, E. Roeloffs, R. L. Wesson
1988, Bulletin of the Seismological Society of America (78) 188-217
On 31 January 1986, at 11:46 EST, an earthquake of mb = 5.0 occurred about 40 km east of Cleveland, Ohio, and about 17 km south of the Perry Nuclear Power Plant. The earthquake was felt over a broad area, including 11 states, the District of Columbia, and parts of...
Mineral resources of the Turtle Mountains Wilderness Study Area, San Bernardino County, California
Keith A. Howard, Jane E. Nielson, Robert W. Simpson, Richard W. Hazlett, Henry V. Alminas, John K. Nakata, John R. McDonnell Jr.
1988, Bulletin 1713-B
At the request of the U.S. Bureau of Land Management, approximately 105,200 acres of the Turtle Mountains Wilderness Study Area (CDCA-307) were evaluated for mineral resources (known) and resource potential (undiscovered). In this report, the area studied is referred to as "the wilderness study area" or simply "the study area";...
Geometry of Upper Cretaceous bentonite beds: Implications about volcanic source areas and paleowind patterns, western interior, United States
W.P. Elder
1988, Geology (16) 835-838
Four bentonite beds near the Cenomanian-Turonian Stage boundary (ca. 90 Ma) can be traced through much of the western interior of the United States. Isopach maps constructed for these bentonite beds indicate that volcanic source areas were positioned both northwest and southwest of...
Rainfall intensity-duration equations
David C. Froehlich
1988, Conference Paper
A method for rapidly developing a rainfall intensity-duration equation for durations less than one hour and recurrence intervals between 2 and 100 years for any location in the conterminous United States is presented. Optimal parameters of a general rainfall-intensity duration equation are determined using precipitation depths for durations of 5,...
Geothermal gradients in the conterminous United States
M. Nathenson, M. Guffanti
1988, Journal of Geophysical Research Solid Earth (93) 6437-6450
Geothermal gradients from published temperature/depth measurements in drill holes generally deeper than 600 m are used to construct a temperature gradient map of the conterminous United States. The broadly contoured map displays 284 temperature gradients that are applicable to a depth of 2 km. In terms of the number of...
Composition and stable-isotope geochemistry of natural gases from Kansas, Midcontinent, U.S.A.
P.D. Jenden, K.D. Newell, I.R. Kaplan, W.L. Watney
1988, Chemical Geology (71) 117-147
More than 28??1012 ft.3 (79??1010 m3) of natural gas and 5.3??109 bbl (8.4??108 m3) of oil have been produced in Kansas, U.S.A., from Paleozoic carbonate and sandstone reservoirs on structural uplifts and shallow embayments along the northern margin of the Anadarko basin. A heavily-explored, geologically well-characterized state, Kansas is an...
Downslope Eulerian mean flow associated with high-frequency current fluctuations observed on the outer continental shelf and upper slope along the northeastern United States continental margin: Implications for sediment transport
B. Butman
1988, Continental Shelf Research (8) 811-840
Eulerian current measurements made 5-7 m above bottom at six stations along the United States east coast continental margin show a net downslope flow of 1-5 cm s-1. Although the scalar current speed decreases with water depth and toward the bottom, fluctuations in the cross-isobath flow were stronger and increasingly...
Fixed-wing airplane versus helicopter surveys of manatees (Trichechus manatus)
Galen B. Rathbun
1988, Marine Mammal Science (4) 71-75
The abundance of manatees, as with most marine mammals, is difficult to determine because they are visible for only short periods of time while at the surface of the water (Eberhardt et al. 1979, Powell et al. 1981). Aerial surveys are generally considered to be the most accurate method of...
The mechanics and three-dimensional internal structure of active magmatic systems: Kilauea volcano, Hawaii
M.P. Ryan
1988, Journal of Geophysical Research Solid Earth (93) 4213-4248
Interpretation of abundant seismic data suggests that Kilauea's primary conduit within the upper mantle is concentrically zoned to about 34-km depth. This zoned structure is inferred to contain a central core region of relatively higher permeability, surrounded by numerous dikes that are in intermittent hydraulic communication with each other and...
Geometry of the Juan de Fuca plate beneath Washington and northern Oregon from seismicity
C.S. Weaver, G.E. Baker
1988, Bulletin of the Seismological Society of America (78) 264-275
Earthquake hypocenters within the subducting Juan de Fuca plate beneath Washington and northern Oregon are interpreted as showing that the direction of plate dip changes from northeast beneath the Puget Sound region to east-southeast beneath southwestern Washington. The shallowest hypocenters within the Juan de Fuca plate are between 30- to...
Carbonate to siliciclastic periplatform sediments: southwest Florida
Charles W. Holmes
1988, Developments in Sedimentology (42) 271-287
Three distinct carbonate deposits have been identified on the slope and adjacent sea floor of the southwestern Florida Platform: (1) reef talus, recognized by shape and location, found on the upper slope of the Yucatan Channel and also east of the Marquesas Keys; (2) hemipelagic sediments, with complex sigmoid-oblique...
Causes of varied sediment gravity flow types on the Alsek Prodelta, northeast Gulf of Alaska
William C. Schwab, Homa J. Lee, Bruce F. Molnia
1988, Marine Geotechnology (7) 317-342
Slope failures and subsequent mass movements have been identified in Holocene glaciomarine sediment on declivities less than 1.3° on the Alsek prodelta, Gulf of Alaska. Isolated collapse features cover less than 10 percent of a nearshore sand deposit, in water depths less than 40 m. In contrast, sediment gravity flow...
Cathodoluminescent bimineralic ooids from the Pleistocene of the Florida continental shelf
R. P. Major, Robert B. Halley, Karen J. Lukas
1988, Sedimentology (35) 843-855
A bored and encrusted late Pleistocene ooid grainstone was recovered from the seafloor at a depth of approximately 40 m on the outer continental shelf of eastern Florida. Ooid cortices are dominantly bimineralic, generally consisting of inner layers of radial magnesian calcite and outer layers of tangential aragonite. Ooid nuclei...
Three decades of geochronologic studies in the New England Appalachians
R. E. Zartman
1988, Geological Society of America Bulletin (100) 1168-1180
Over the past 30 years, both isotope geochronology and plate tectonics grew from infancy into authoritative disciplines in the geological sciences. Previously, mountain systems like the Appalachians had been viewed almost entirely in the context of the classical geosyncline, implying a gradualism in stratigraphic and structural change throughout the orogen....
Post-epizootic surveys of waterfowl for duck plague (duck virus enteritis)
C. J. Brand, D. E. Docherty
1988, Avian Diseases (32) 722-730
Surviving birds from nine duck plague outbreaks in urban and confined waterfowl were sampled for duck plague (DP) virus and DP antibody during 1979-86. Duck plague virus was found in combined oral and cloacal swabs of birds from three outbreaks, and DP-neutralizing antibody was demonstrated in some birds from all...
Curie temperature isotherm analysis and tectonic implications of aeromagnetic data from Nevada
R.J. Blakely
1988, Journal of Geophysical Research Solid Earth (93) 11817-11832
Estimates of the depth to the Curie temperature isotherm in Nevada are in accordance with other regional geologic and geophysical information and together can be explained in the context of present-day tectonism. A method to estimate the depth extent of magnetic sources from the statistical properties of magnetic anomalies was...
Crustal velocities near Coalinga, California, modeled from a combined earthquake/explosion refraction profile
N. Macgregor-Scott, A. Walter
1988, Bulletin of the Seismological Society of America (78) 1475-1490
Crustal velocity structure for the region near Coalinga, California, has been derived from both earthquake and explosion seismic phase data recorded along a NW-SE seismic-refraction profile on the western flank of the Great Valley east of the Diablo Range. Comparison of the two data sets reveals P-wave phases in common...
