High-energy carbonate-sand accumulation, the Quicksands, southwest Florida Keys
Eugene A. Shinn, Barbara H. Lidz, Charles W. Holmes
1990, Journal of Sedimentary Research (60) 952-967
High-resolution seismic-reflection profiles of the Quicksands, located along a broad ridge on the platform shelf west of Key West, Florida, indicate a significant deposit of non-oolitic carbonate sand occurs in a belt 47 km long by 28 km wide. The surface of the belt is ornamented by large (5 m),...
Major off-axis hydrothermal activity on the northern Gorda Ridge
Peter A. Rona, Roger P. Denlinger, M. R. Fisk, K. J. Howard, G. L. Taghon, Kim D. Klitgord, James S. McClain, G. R. McMurray, J. C. Wiltshire
1990, Geology (18) 493-496
The first hydrothermal field on the northern Gorda Ridge, the Sea Cliff hydrothermal field, was discovered and geologic controls of hydrothermal activity in the rift valley were investigated on a dive series using the DSV Sea Cliff. The Sea Cliff hydrothermal field was discovered where predicted...
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...
Near-surface velocities and attenuation at two boreholes near Anza, California, from logging data
Joe B. Fletcher, T. Fumal, Hsi-Ping Liu, L.C. Carroll
1990, Bulletin of the Seismological Society of America (80) 807-831
To investigate near-surface site effects in granite rock, we drilled 300-m-deep boreholes at two sites which are collocated with stations from the digital array at Anza, California. The first borehole was sited at station KNW (Keenwild fire station), which is located along a ridge line about 8.7 km east of...
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...
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...
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...
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,...
Crustal structure of the northwestern Basin and Range Province from the 1986 Program for Array Seismic Studies of the Continental Lithosphere Seismic Experiment
Harley M. Benz, R. B. Smith, Walter D. Mooney
1990, Journal of Geophysical Research (95) 21823-21842
A portion of northwestern Nevada was imaged to determine the crustal structure and to assess reported differences between refraction versus reflection determinations of Moho depth and how the crustal composition and structure has been influenced by volcanic and extension mechanisms. Interpretation of the refraction/wide-angle reflection data suggests that the crust...
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...
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...
A parabolic function to modify Thornthwaite estimates of potential evapotranspiration for the eastern United States
G. J. McCabe Jr.
1989, Physical Geography (10) 176-189
The Thornthwaite potential evapotranspiration model is well known and widely used, but has received some criticism as it is primarily based on air temperature to estimate potential evapotranspiration. Errors of the Thornthwaite model can be analyzed using adjusted pan evaporation as an index of potential evapotranspiration. An examination of ratios of adjusted pan...
Constraints on the Anadarko Basin-Wichita uplift boundary interpreted from aeromagnetic data
Meridee Jones-Cecil, Anthony J. Crone
1989, Book chapter, Anadarko Basin symposium, 1988 (Circular 90)
Modeling and interpretation of aeromagnetic data across the transition between the Anadarko basin and the Wichita uplift in the vicinity of the scarp on the Meers fault (Fig. 1) constrains structural relationships and lithologic contrasts at this boundary. We digitized aeromagnetic data from the map based on a detailed survey...
Horizontal stresses from well-bore breakouts and lithologies associated with their formation, Oklahoma and Texas Panhandle
Richard L. Dart
1989, Book chapter, Anadarko Basin symposium, 1988 (Circular 90)
Orientations of crustal stresses are inferred from stress-induced well-bore breakouts in three areas in the south-central United States: the eastern part of the Anadarko basin in central Oklahoma, the Marietta basin in south-central Oklahoma, and the Bravo dome area of the central Texas Panhandle. Inferred directions of maximum horizontal principal...
Structural evolution of the southeastern portion of the Anadarko Basin region
William J. Perry Jr.
1989, Book chapter, Anadarko Basin symposium, 1988 (Circular 90)
Field investigations in the Lake Classen-Turner Falls, Oklahoma, area of the northern Arbuckle anticline, on the southeastern margin of the Anadarko basin, indicate that transpressional (oblique compressional) deformation of Late Pennsylvanian age dominated the structural development of this area. The Arbuckle anticline is detached along the NW -trending, SW -dipping,...
Quantitative petrographic analysis of Desmoinesian sandstones from Oklahoma
Thaddeus S. Dyman
1989, Book chapter, Anadarko Basin symposium, 1988 (Circular 90)
Desmoinesian sandstones from the northern Oklahoma platform and the Anadarko, Arkoma, and Ardmore basins record a complex interaction between mid-Pennsylvanian source-area tectonism and cyclic sedimentation patterns associated with numerous transgressions and regressions. Framework-grain summaries for 50 thin sections from sandstones of the Krebs, Cabaniss, and Marmaton Groups and their surface...
Borax in the supraglacial moraine of the Lewis Cliff, Buckley Island quadrangle--first Antarctic occurrence
J. J. Fitzpatrick, D.R. Muhs
1989, Antarctic Journal of the United States (24) 63-65
During the 1987-1988 austral summer field season, membersof the south party of the antarctic search for meteorites south-ern team* working in the Lewis Cliff/Colbert Hills region dis-covered several areas of unusual mineralization within theLewis Cliff ice tongue and its associated moraine field (figure1). The Lewis Cliff ice tongue (84°15'S 161°25'E)...
The style of late Cenozoic deformation at the eastern front of the California Coast Ranges
Carl M. Wentworth, Mark D. Zoback
1989, Tectonics (8) 237-246
The 1983 Coalinga earthquake occurred at the eastern boundary of the California Coast Ranges in response to northeast directed thrusting. Such movements over the past 2 Ma have produced Coalinga anticline by folding above the blind eastern tip of the Coalinga thrust zone. The 600-km length of the Coast Ranges...
Taconic plate kinematics as revealed by foredeep stratigraphy, Appalachian orogen
D. C. Bradley
1989, Tectonics (8) 1037-1049
Destruction of the Ordovician passive margin of eastern North America is recorded by an upward deepening succession of carbonates, shales, and flysch. A compilation of the age of shelf drowning (carbonate-to-shale transition) reveals the degree to which orogeny was diachronous both across and along strike. Shelf drowning occurred first at...
Avian community response to small-scale habitat disturbance in Maine
E.L. Derleth, D.G. McAuley, T.J. Dwyer
1989, Canadian Journal of Zoology (67) 385-390
The effects of small clearcuts (1 - 8 ha) on avian communities in the forest of eastern Maine were studied using point counts during spring 1978 - 1981. Surveys were conducted in uncut (control) and clear-cut (treatment) plots in three stand types: conifer, hardwood, and mixed growth. We...
Population declines in North American birds that migrate to the neotropics
C.S. Robbins, J.R. Sauer, R.S. Greenberg, Sam Droege
1989, Proceedings of the National Academy of Sciences (86) 7658-7662
Using data from the North American Breeding Bird Survey, we determined that most neotropical migrant bird species that breed in forests of the eastern United States and Canada have recently (1978-1987) declined in abundance after a period of stable or increasing populations. Most permanent residents and temperate-zone migrants did...
Population ecology and harvest of the American black duck: a review
D. H. Rusch, C.D. Ankney, H. Boyd, J. R. Longcore, Frank Montalbano III, J.K. Ringelman, Vernon D. Stotts
1989, Wildlife Society Bulletin (17) 379-406
1. The purpose of our review was to examine available data on population trends and current status of black ducks and trends in natality and survival and to relate these, where possible, to changes in habitat, predation, disease, contaminants, harvest, and hybridization with mallards. 2. The number of black...
Lower Permian sediment-gravity-flow sequence, eastern California
C.H. Stevens, Michael S. Lico, Paul Stone
1989, Sedimentary Geology (64) 1-12
The Lower Permian (middle Wolfcampian) Zinc Hill sequence, a 65- to 110-m-thick series of beds in the Owens Valley Group in east-central California, comprises sediment-gravity-flow deposits consisting of carbonate sediment that originated on, and siliciclastic sediment that may have been generally ponded behind, a carbonate shelf to the east and...
Tulelake, California: The last 3 million years
D.P. Adam, A.M. Sarna-Wojcicki, Hugh J. Rieck, J.P. Bradbury, W.E. Dean, R. M. Forester
1989, Palaeogeography, Palaeoclimatology, Palaeoecology (72) 89-103
The Tulelake basin, formed by east-west extension and faulting during the past several million years, contains at least 550 m of lacustrine sediment. Interdisciplinary studies of a 334 m-long cored section from the town of Tulelake, California, near the center of the basin, document a 3-m.y. record of environmental changes....
