The 3 December 1988 Pasadena, California earthquake: Evidence for strike-slip motion on the Raymond Fault
L.M. Jones, K.E. Sieh, E. Hauksson, L.K. Hutton
1990, Bulletin of the Seismological Society of America (80) 474-482
The Pasadena earthquake (ML = 4.9) occurred on 3 December 1988, at a depth of 16 km. The hypocenters of the earthquake and its aftershocks define a east-northeast striking, steeply northwest-dipping surface that projects up to the active surficial trace of the Raymond fault. One of the nodal planes of...
Sources and fractionation processes influencing the isotopic distribution of H, O and C in the Long Valley hydrothermal system, California, U.S.A.
A. F. White, M. L. Peterson, H. Wollenberg, S. Flexser
1990, Applied Geochemistry (5) 571-585
The isotopic ratios of H, O and C in water within the Long Valley caldera, California reflect input from sources external to the hydrothermal reservoir. A decrease in δD in precipitation of 0.5‰ km−1, from west to east across Long Valley,...
Growth and equilibrium in sea otter populations
J. A. Estes
1990, Journal of Animal Ecology (59) 385-400
(1) Counts through time were compiled for five sea otter (Enhydra lutris) populations in the north-east Pacific Ocean that were below equilibrium density: Attu Island, south-east Alaska, British Columbia, Washington State, and central California. Similar data were obtained from the equilibrium density population at Amchitka Island in 1971 and 1986....
Rhyolitic calderas of the Yukon-Tanana Terrane, east central Alaska: volcanic remnants of a mid-Cretaceous magmatic arc
C. R. Bacon, H.L. Foster, James G. Smith
1990, Journal of Geophysical Research (95) 21451-21461
Four large but poorly exposed rhyolitic calderas are present in the Yukon-Tanana terrane (YTT) in east central Alaska. At least two are mid-Cretaceous in age (~93 Ma). Similar volcanic rocks, the South Fork Volcanics, occur northeast of the Tintina fault in Yukon Territory. Evidence for the calderas consists of thick...
Chemistry and origin of minor and trace elements in selected vitrinite concentrates from bituminous and anthracitic coals
C.A. Palmer, P.C. Lyons
1990, International Journal of Coal Geology (16) 189-192
Organic and inorganic affinities were determined by comparing the elemental concentrations in the vitrinite concentrates to the concentrations in the companion whole coals. The ratios of these concentrations for 33 selected elements are shown in Figure 1. Ratios greater than 1...
Epithermal gold-siver deposits in the western United States: time-space products of evolving plutonic, volcanic and tectonic environments
Byron R. Berger, Harold F. Bonham Jr.
1990, Journal of Geochemical Exploration (36) 103-142
The western United States has been the locus of considerable subaerial volcanic and plutonic igneous activity since the mid-Mesozoic. After the destruction of the Jurassic-Cretaceous magmatic arc-trench system, subduction was re-established in the Late Mesozoic with low-angle underthrusting of the oceanic plate beneath western North America. This resulted in crustal...
Precambrian terrane of north-central Wisconsin: an aeromagnetic perspective
E. R. King
1990, Canadian Journal of Earth Sciences (27) 1472-1477
A shaded relief magnetic map covering most of the region of exposed Precambrian rocks of north-central Wisconsin shows the structural grain and many lithologic units with clarity and comprehensive detail. The area includes part of the volcanic sequence of the Keweenawan Supergroup south of Lake Superior, the southern margin of...
Thermal history of rocks in southern San Joaquin Valley, California: evidence from fission-track analysis
Nancy D. Naeser, Charles W. Naeser, Thane H. McCulloh
1990, American Association of Petroleum Geologists Bulletin (74) 13-29
The theory of the fission-track method and its application to sedimentary basin analysis is illustrated by a case study in the southern San Joaquin Valley, California. Fission tracks provide a powerful tool for studying the thermal history of sedimentary basins because the two minerals most commonly used in fission-track studies,...
Variations in the styles of erosion along the Florida Escarpment, eastern Gulf of Mexico
D.C. Twichell, L.M. Parson, C. K. Paull
1990, Marine and Petroleum Geology (7) 253-266
GLORIA sidescan sonographs and Seabeam bathymetric data show morphological differences along the Florida Escarpment which reflect that different erosional styles have been active along different parts of this carbonate platform edge. The northern half of the escarpment is cut by numerous small ravines spaced 1-5 km apart. Its southern half...
Climate factor for small-basin flood frequency
R.W. Lichty, M.R. Karlinger
1990, Water Resources Bulletin (26) 577-586
A climate factor, CT, (T = 2-, 25-, and 100-year recurrence intervals) that delineates regional trends in small-basin flood frequency was derived using data from 71 long-term rainfall record sites. Values of CT at these sites were developed by a regression analysis that related rainfall-runoff model estimates of T-year floods...
Patrick Draw field, Wyoming - 1 seismic expression of subtle strat trap in Upper Cretaceous Almond
Robert T. Ryder, Myung W. Lee, Warren F. Agena, Robert C. Anderson
1990, Oil & Gas Journal (88) 54-57
The east flank of the Rock Springs uplift and the adjacent Wamsutter arch contain several large hydrocarbon accumulations. Among these accumulations are Patrick Draw field, which produces oil and gas from a stratigraphic trap in the Upper Cretaceous Almond formation, and Table Rock field, a faulted anticlinal trap that produces...
Modern aerial gamma-ray spectrometry and regional potassium map of the conterminous United States
Joseph S. Duval
1990, Journal of Geochemical Exploration (39) 249-253
Aerial gamma-ray surveys of the natural environment measure the flux of gamma rays produced by the radioactive decay of 40K, 214Bi, and 208Tl in the upper 10–20 cm of surface materials. 40K is a radioactive potassium isotope which can be used to estimate the total amount of potassium in the soils and rocks. 214Bi is...
Summer-fall survival of American woodcock in Maine
Eric L. Derleth, Greg F. Sepik
1990, Journal of Wildlife Management (54) 97-106
We estimated summer-fall (15 Jun-20 Oct) survival for 32 adult and 96 fledged young American woodcock (Scolopax minor) radiotagged in eastern Maine during 1982-84 using single-interval, multiple-interval, and nonparametric (product-limit) methods. Single-interval survival estimates were 0.90, 0.88, 0.57, and 0.73 for adult males, adult females, young males, and young females,...
Contrasting soils and landscapes of the Piedmont and Coastal Plain, eastern United States
Helaine W. Markewich, Milan J. Pavich, Gary R. Buell
1990, Geomorphology (3) 417-447
The Piedmont and Coastal Plain physiographic provinces comprise 80 percent of the Atlantic Coastal states from New Jersey to Georgia. The provinces are climatically similar. The soil moisture regime is udic. The soil temperature regime is typically thermic from Virginia through Georgia, although it is mesic at altitudes above 400...
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...
Precious metals of Wyoming
W. Dan Hausel
Donald M. Hausen, Douglas N. Halbe, Erich U. Petersen, William J. Tafuri, editor(s)
1990, Conference Paper
Within the State boundaries are numerous gold deposits and anomalies scattered throughout the geological record. Many examples occur in rocks ranging in age from Archean to Tertiary, and in Quaternary to Recent unconsolidated gravels and sands. Yet relatively few of these deposits and anomalies have been explored and only a...
Integration of COCORP deep reflection and magnetic anomaly analysis in the southeastern United States: Implications for origin of the Brunswick and East Coast magnetic anomalies: Alternative interpretation and reply
Deborah R. Hutchinson, Kim D. Klitgord, Anne M. Trehu, John H. McBride, Kim Nelson
1990, Geological Society of America Bulletin (102) 271-279
Integration of magnetic anomaly analysis with COCORP deep reflection data from the southeastern United States provides three new constraints on the interpretation of the Brunswick and East Coast magnetic anomalies, as well as on the reflection data. These are as follows. (1) The source of the Brunswick anomaly lies within...
Review of paleomagnetic data from the Klamath Mountains, Blue Mountains, and Sierra Nevada; Implications for paleogeographic reconstructions
Edward A. Mankinen, William P. Irwin
1990, Book chapter, Paleozoic and Early Mesozoic Paleogeographic Relations; Sierra Nevada, Klamath Mountains, and Related Terranes: GSA Special Papers v. 255
Paleomagnetic studies of the Klamath Mountains, Blue Mountains, Sierra Nevada, and northwestern Nevada pertain mostly to Jurassic and Cretaceous rocks, but some data also are available for Permian and Triassic rocks of the region. Large vertical-axis rotations are indicated for rocks in many of the terranes, but few studies show...
Perspectives on earthquake hazards in the New Madrid seismic zone, Missouri
P.C. Thenhaus
1990, Earthquakes & Volcanoes (USGS) (22) 4-21
A sequence of three great earthquakes struck the Central United States during the winter of 1811-1812 in the area of New Madrid, Missouri. they are considered to be the greatest earthquakes in the conterminous U.S because they were felt and caused damage at far greater distances than any other earthquakes...
Faults of the central part of the Lewis and Clark line and fragmentation of the Late Cretaceous foreland basin in west-central Montana
C. A. Wallace, D. J. Lidke, R. G. Schmidt
1990, Geological Society of America Bulletin (102) 1021-1037
The Lewis and Clark line is a prominent zone of strike-slip, dip-slip, and oblique-slip faults that extends from near Wallace, Idaho, to east of Helena, Montana. Faults of this zone have been intermittently active from Middle Proterozoic to Holocene time, and because of numerous tectonic overprints, controversy continues about displacement...
Biostratigraphy, lithofacies and paleoenvironments of the Gulf 718-1 well, U.S. Mid-Atlantic Outer Continental Shelf
L. J. Poppe, R.E. Hall, H.L. Cousminer, R.W. Stanton, W.E. Steinkraus
1990, Marine Geology (92) 27-50
The Gulf 718-1 well, located on the southwestern flank of the Schlee Dome, was drilled to a total depth of 3905 m. The oldest sedimentary rocks sampled were not fossiliferous, but are probably of Late Jurassic age. Sandstones and siltstones are the dominant lithologies except in the intervals between 1213...
Ground-water resources of Honey Lake Valley, Lassen County, California, and Washoe County, Nevada
Elinor H. Handman, Clark J. Londquist, Douglas K. Maurer
1990, Water-Resources Investigations Report 90-4050
Honey Lake Valley is a 2,200 sq-mi, topographically closed basin about 35 miles northwest of Reno, Nevada. Unconsolidated basin-fill deposits on the valley floor and fractured volcanic rocks in northern and eastern uplands are the principal aquifers. In the study area, about 130,000 acre- ft of water recharges the aquifer...
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...
Sediment movement along the U.S. east coast continental shelf-II. Modelling suspended sediment concentration and transport rate during storms
V.D. Lyne, B. Butman, W.D. Grant
1990, Continental Shelf Research (10) 429-460
Long-term near-bottom wave and current observations and a one-dimensional sediment transport model are used to calculate the concentration and transport of sediment during winter storms at 60-80 m water depth along the southern flank of Georges Bank and in the Mid-Atlantic Bight. Calculations are presented for five stations, separated by...
Chronologic and isotopic framework for early Proterozoic crustal evolution in the eastern Mojave Desert region, SE California
J. L. Wooden, D. M. Miller
1990, Journal of Geophysical Research (95) 20133-20146
The Early Proterozoic geologic evolution of the eastern Mojave Desert region, as defined by characteristics of its supracrustal rocks, granitoids, metamorphism, structural history, and Pb and Nd isotopic signature, contrasts sharply with other Proterozoic provinces of the southwestern United States. The oldest supracrustal rocks of the Mojave Desert region contain...
