Geophysical constraints on Washington convergent margin structure
Carol A. Finn
1990, Journal of Geophysical Research Solid Earth (95) 19533-19546
Gravity and magnetic maps of western Washington reveal the lateral structure and fabric of the Washington Coast Range, Puget Basin, and southern Washington Cascade Range. The magnetic and gravity maps show large amplitude positive anomalies associated with the shallow but largely buried section of Washington Coast Range mafic rocks which...
Digital Line Graphs from 1:2,000,000-Scale Maps
1990, Data Users Guide 3
Earth sciences and emergency management
R. Andrews
1990, Earthquakes & Volcanoes (USGS) (22) 198-200
As understanding of California's earthquake risk had increased over the past decade, there has been a concurrent expansion of interactions between emergency management professionals and earth scientists. The effort have resulted not from a formal plan-though the U.S National Earthquake Hazards Reduction Program has provided much of the support for...
Geology and land use
R.D. Brown
1990, Earthquakes & Volcanoes (USGS) (22) 252-253
Geologists' eyes are trained to find and trace such natural landmarks as flood plains, landslide scars, retreating shoreline bluffs, or surface traces of active earthquake faults. more and more often, in developing areas, we find these obvious signs of trouble being erased by urban development. A geological hazard concealed by...
Of parachuting spiders and meat-eating beetles
W. Booth
1990, Earthquakes & Volcanoes (USGS) (22) 161-164
Scientists have been amazed at the rapid recovery of life that followed the volcanic eruption at Mount St. Helens 10 years ago, but to the uninitiated, the place is still a stark and awesome wasteland. Here and there on the rolling hills of gray volcanic ash around the volcano are clumps...
Influences of adjacent forest management activities on migratory elk of Mount Rainier National Park: Final report
Kurt J. Jenkins, Edward E. Starkey
1990, Report
No abstract available....
Conducting field studies for testing pesticide leaching models
Charles N. Smith, Rudolph S. Parrish, David S. Brown
1990, International Journal of Environmental Analytical Chemistry (39) 3-21
A variety of predictive models are being applied to evaluate the transport and transformation of pesticides in the environment. These include well known models such as the Pesticide Root Zone Model (PRZM), the Risk of Unsaturated-Saturated Transport and Transformation Interactions for Chemical Concentrations Model (RUSTIC) and the Groundwater Loading Effects...
Kilbuck terrane: Oldest known rocks in Alaska
S. E. Box, E. J. Moll-Stalcup, J. L. Wooden, J.Y. Bradshaw
1990, Geology (18) 1219-1222
The Kilbuck terrane in southwestern Alaska is a narrow, thin crustal sliver or flake of amphibolite facies orthogneiss. The igneous protolith of this gneiss was a suite of subduction-related platonic rocks. U-Pb data on zircons from trondhjemitic and granitic samples yield upper-intercept (igneous)...
The theory and prototype development of a stress-monitoring system
H.S. Swolfs, J.B. Walsh
1990, Bulletin of the Seismological Society of America (80) 197-208
A new approach has been developed by which changes in rock stress can be measured directly. The measurement of stress change depends on the reaction of a slender, compliant cavity to the transient variations of rock stress about the cavity. A liquid-filled pressurized cell, emplaced in the cavity, provides the...
A decade of dome growth at Mount St. Helens, 1980-90
D. A. Swanson
1990, Geoscience Canada (17) 154-157
The growth of the dacite dome at Mount St. Helens between 1980 and 1986 has been more intensively studied than that of any other dome-building eruption. The growth has been complex in detail, but remarkably regular overall. This paper summarizes some of what has been learned and provides many references...
Relations of zoned pegmatites to other pegmatites, granite, and metamorphic rocks in the southern Black Hills, South Dakota
J.J. Norton, J. A. Redden
1990, American Mineralogist (75) 631-655
The pegmatite field and the Harney Peak Granite of the southern Black Hills, South Dakota, form an igneous system that progresses from slightly biotitic muscovite granite through layered pegmatitic granite, with alternating sodic and potassic rocks, to simple plagioclase-quartz-perthite pegmatites, and on to zoned pegmatites. Most of the country rocks...
Late Pleistocene and Holocene sedimentary facies on the Ebro continental shelf
J. Diaz, C.H. Nelson, J. H. Barber Jr., S. Giro
1990, Marine Geology (95) 333-352
Late Pleistocene—Holocene history of the Ebro continental shelf of northeastern Spain is recorded in two main sedimentary units: (1) a lower, transgressive unit that covers the shelf and is exposed on the outer shelf south of 40°40′N, and (2) an upper,...
Geologic map of Mount Mazama, Crater Lake, Oregon
Charles Bacon
1990, Conference Paper, Transactions - Geothermal Resources Council
Crater Lake caldera collapsed about 6,850 yr B.P. during the climactic eruption of Mount Mazama, a High Cascade basaltic andesitic to dacitic volcanic center that was constructed during a period of about 400,000 yr. The caldera and the products of the climactic eruption are clear evidence for the presence of...
Immediate impact of the 'Exxon Valdez' oil spill on marine birds
John F. Piatt, Calvin J. Lensink, William Butler, Marshal Kendziorek, David R. Nysewander
1990, The Auk (107) 387-397
On 24 March 1989, the oil tanker 'Exxon Valdez' spilled 260,000 barrels of crude oil in Prince William Sound, Alaska. Oil eventually drifted over $30,000\ {\rm km}^{2}$ of coastal and offshore waters occupied by approximately one million marine birds. More than 30,000 dead birds of 90 species were retrieved from...
Effects of human disturbance on breeding Least and Crested Auklets at St. Lawrence Island, Alaska
John F. Piatt, Bay D. Roberts, Wayne W. Lidster, John L. Wells, Scott A. Hatch
1990, The Auk (107) 342-350
We studied breeding success, chick growth, and diets of Least (Aethia pusilla) and Crested (A. cristatella) auklets on St. Lawrence Island, Alaska, in summer 1987. Least Auklets had higher breeding success on control plots (50-66%) than on disturbed plots (36%). Crested Auklets had a breeding success of 42% on disturbed...
Phytoplankton dynamics in three Rocky Mountain lakes, Colorado, USA
Diane M. McKnight, Richard L. Smith, J. Platt Bradbury, Jill Baron, Sarah A. Spaulding
1990, Arctic and Alpine Research (22) 264-274
In 1984 and 1985 seasonal changes in phytoplankton were studied in a system of three lakes in Loch Vale, Rocky Mountain National Park, Colorado. Three periods were evident: (1) A spring bloom, during snowmelt, of the planktonic diatom Asterionella formosa, (2) a mid-summer period of minimal algal abundance, and (3)...
Geothermal systems within the Mammoth Corridor in Yellowstone National Park and the adjacent Corwin Springs KGRA
Michael Sorey, Elizabeth Colvard, N.C. Sturchio
1990, Conference Paper, Transactions - Geothermal Resources Council
A study of potential impacts of geothermal development in the Corwin Springs KGRA north of Yellowstone Park on thermal springs within the Park is being conducted by the U.S. Geological Survey. Thermal waters in the KGRA and at Mammoth Hot Springs, located 13 km inside the Park boundary, are high...
Deep crustal structure of the Cascade Range and surrounding regions from seismic refraction and magnetotelluric data
William D. Stanley, Walter D. Mooney, Gary S. Fuis
1990, Journal of Geophysical Research (95) 19419-19438
Several regional seismic refraction and magnetotelluric (MT) profiles have been completed across the Cascade Range and surrounding geologic provinces in California, Oregon, and Washington. Analysis of three MT and two seismic refraction profiles in Oregon and a coincident MT and refraction profile in northern California show a high degree of...
A Miocene termite nest from southern Argentina and its paleoclimatological implications
Thomas M. Bown, Jose H. Laza
1990, Ichnos: An International Journal for Plant and Animal Traces (1) 73-79
A Miocene termitarium attributable to the extant termite Syntermes (Isoptera: Termitidae, Nasutitermitinae) is the first fossil termite nest reported from South America and possibly the oldest record of the Isoptera from that continent. The fossil remains consist of most of the periphery of the subterranean portion of a single Syntermes nest, including chambers and...
Avalon terrane in eastern coastal Maine: Seismic refraction-wide-angle reflection data
J. Luetgert, C.E. Mann
1990, Geology (18) 878-881
A 145-km-long seismic refraction line recorded parallel to the eastern coastline of Maine within the Avalon terrane provides information about the crustal velocity structure within the Avalon block and its relation to other Appalachian terranes. A crustal velocity model for the upper 8...
Seismic anisotropy due to preferred mineral orientation observed in shallow crustal rocks in southern Alaska
T.M. Brocher, N.I. Christensen
1990, Geology (18) 737-740
Laboratory velocity measurements and structural field relations explain the observation of a significant seismic anisotropy within highly foliated rocks in southern Alaska. The orientation of the principal compressive stress indicates that this anisotropy is not related to extensive dilatancy, but can be satisfactorily...
Simulated effects of climatic change on runoff and drought in the Delaware River Basin
Mark A. Ayers, Gary D. Tasker, David M. Wolock, Gregory J. McCabe, Lauren E. Hay
Singh Udai P.Helweg Otto J., editor(s)
1990, Conference Paper, Supplying Water and Saving the Environment for Six Billion People
Various projection of climatic change were applied to watershed models of the Delaware River basin. Simulations indicate that a warming could reduce annual runoff by as much as 25 percent if current precipitation patterns continue. Simulations indicate that the largest changes in basin drought are in response to relatively small...
Postrelease monitoring of radio-instrumented sea otters in Prince William Sound
C. Monnett, L.M. Rotterman, C. Stack, Daniel H. Monson
Keith Bayha, Jennifer Kormendy, editor(s)
1990, Biological Report 90(12)
Sea otters (Enhydra lutris) that were captured in western Prince William Sound (PWS) or the Gulf of Alaska, treated, and held in captivity at the temporary rehabilitation centers established in response to the T/V Exxon Valdez oil spill were instrumented with radio transmitters, released into eastern PWS, and monitored by...
Shorebirds and herring roe in Prince William Sound, Alaska
David W. Norton, Stanley E. Senner, Robert E. Gill Jr., Philip D. Martin, J.M. Wright, Allan K. Fukuyama
1990, American Birds (44) 367-508
No abstract available....
Ecology and control of the black rat (Rattus rattus) in Channel islands National Park
W.A. Erickson, W. L. Halvorson
1990, Technical Report 38
No abstract available at this time...
