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...
Seasonal movements of adult female polar bears in the Bering and Chukchi seas
Gerald W. Garner, Steven T. Knick, David C. Douglas
1990, Bears: Their Biology and Management (8) 219-226
Ten adult female polar bears (Ursus maritimus) were fitted with satellite telemetry collars during March 1986 in the Kotzebue Sound area of the Chukchi Sea. During March-April 1987, 2 of these bears were refitted with satellite telemetry collars and an additional 10 adult females were collared in the northern Bering...
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, K. D. 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...
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...
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...
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,...
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...
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)...
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...
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...
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....
Preliminary geologic map of the Puu Anahulu quadrangle, Hawaii
Richard B. Moore, David A. Clague, Wendy A. Bohrson, W. S. Wise
1989, Open-File Report 89-284
Vent deposits and lava flows from Hualalai Volcano and lava flows from Mauna Loa and Mauna Kea Volcanoes cover the Puu Anahulu 7 1/2-minute quadrangle. Hualalai's diffuse north-trending rift zone, marked by the large trachyte cone of Puu Waawaa and several basaltic spatter cones, is located mainly in the southwestern...
Alluvial and bedrock aquifers of the Denver Basin — Eastern Colorado's dual ground-water resource
Stanley G. Robson
1989, Water Supply Paper 2302
Large volumes of ground water are contained in alluvial and bedrock aquifers in the semiarid Denver basin of eastern Colorado. The bedrock aquifer, for example, contains 1.2 times as much water as Lake Erie of the Great Lakes, yet it supplies only about 9 percent of the ground water used...
Geology and water resources of Owens Valley, California
Kenneth J. Hollett, W.R. Danskin, W. F. McCaffrey, C.L. Walti
1989, Open-File Report 88-715
Owens Valley, a long, narrow valley located along the east flank of the Sierra Nevada in east-central California, is the main source of water for the city of Los Angeles. The city diverts most of the surface water in the valley into the Owens River-Los Angeles Aqueduct system, which transports...
Geologic map of the Latir Volcanic Field and adjacent areas, northern New Mexico
P. W. Lipman, J. C. Reed Jr.
1989, IMAP 1907
This map was first published as a printed edition in 1989. The geologic data have now been captured digitally and are presented here along with images of the printed map sheet and component parts as PDF files. This map encompasses all or parts of ten 7.5 minute quadrangles in the Taos...
Distribution, facies, ages, and proposed tectonic associations of regionally metamorphosed rocks in northern Alaska
Cynthia Dusel-Bacon, William Peters Brosge, Alison B. Till, Elizabeth O. Doyle, Charles F. Mayfield, Hillard N. Reiser, Thomas P. Miller
1989, Professional Paper 1497-A
Approximately half of the exposed bedrock in northern Alaska has been regionally metamorphosed. The most widespread metamorphic episode that affected northern Alaska occurred under low-grade, initially high-pressure (blueschist-facies) conditions during Mesozoic time. This episode is thought to have been related to the obduction of one or more oceanic terranes onto...
Summary and interpretation of geochemical maps for stream sediment and heavy mineral concentrate samples, Mount Hayes Quadrangle, eastern Alaska Range, Alaska
Gary C. Curtin, Richard B. Tripp, Warren J. Nokleberg
1989, Miscellaneous Field Studies Map 1996-B
This report and accompanying maps summarize the results of geochemical exploration studies in the Mount Hayes quadrangle, Alaska. This is one of a series of maps and reports on the geological, geochemical, and geophysical studies of the quadrangle prepared as part of the Alaskan Mineral Resource Assessment Program (AMRAP) of...
Hydrogeology, ground-water movement, and subsurface storage in the Floridan aquifer system in southern Florida
Frederick W. Meyer
1989, Professional Paper 1403-G
The Floridan aquifer system of southern Florida is composed chiefly of carbonate rocks that range in age from early Miocene to Paleocene. The top of the aquifer system in southern Florida generally is at depths ranging from 500 to 1,000 feet, and the average thickness is about 3,000 feet. It...
Water resources data for Oregon, water year 1988, Volume 1. Eastern Oregon
L.E. Hubbard, R. L. Moffatt, T.A. Herrett, R.L. Kraus, G.P. Ruppert
1989, Water Data Report OR-88-1
No abstract available....
