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Filter Total Items: 1426
Internal tides and the Continental Slope: Curious waves coursing beneath the surface of the sea may shape the margins of the world's landmasses Internal tides and the Continental Slope: Curious waves coursing beneath the surface of the sea may shape the margins of the world's landmasses
No abstract available.
Authors
David A. Cacchione, Lincoln F. Pratson
Geochemistry of coastal tarballs in southern California—A tribute to I. R. Kaplan Geochemistry of coastal tarballs in southern California—A tribute to I. R. Kaplan
In the southern offshore California borderland, natural oil seeps occur mainly in the Santa Barbara Channel and Santa Monica Bay. Coastal tar residues (tarballs) from beaches bordering these water bodies were analyzed for six geochemical parameters: stable carbon isotopic compositions (δ13C) and four biomarker ratios (C28IC29 hopane, sterane/hopane, refractory index, bisnorhopane index)...
Authors
Keith A. Kvenvolden, Frances D. Hostettler
Chapter 14 Rex Chert member of the Permian Phosphoria Formation: Composition, with emphasis on elements of environmental concern Chapter 14 Rex Chert member of the Permian Phosphoria Formation: Composition, with emphasis on elements of environmental concern
We present bulk chemical and mineralogical compositions, as well as petrographic and outcrop descriptions, of rocks collected from three measured outcrop sections of the Rex Chert Member of the Phosphoria Formation in southeast Idaho. The three measured sections were chosen from 10 outcrops of Rex Chert that were described in the field. The Rex Chert overlies the Meade Peak Phosphatic...
Authors
James R. Hein, B.R. McIntyre, R.B. Perkins, David Z. Piper, J. G. Evans
Data report: Stable isotopic measurements of sedimentary organic matter and N. pachyderma (s.) from site 1166, Prydz Bay continental shelf Data report: Stable isotopic measurements of sedimentary organic matter and N. pachyderma (s.) from site 1166, Prydz Bay continental shelf
We report the results of downhole stable isotopic (ẟ13Corg [organic carbon] and ẟ15N) and elemental measurements (total organic carbon [TOC], total nitrogen [TN], and carbon/nitrogen [C/N]) of sedimentary organic matter (SOM) along with stable isotopic measurements (ẟ18O and ẟ13C) of left-coiling Neogloboquadrina pachyderma planktonic foraminifers from Ocean Drilling Program Site 1166...
Authors
Kevin M. Theissen, Robert Dunbar, Alan K. Cooper
Seismic stratigraphic correlations between ODP sites 742 and 1166: Implications for depositional paleoenvironments in Prydz Bay, Antarctica Seismic stratigraphic correlations between ODP sites 742 and 1166: Implications for depositional paleoenvironments in Prydz Bay, Antarctica
New high-resolution seismic reflection data recorded between Ocean Drilling Program Sites 1166 and 742 are interpreted to link acoustic features to lithologic units at the two drill sites. New findings include: (1) Site 1166 drilled a deeper (older) section than Site 742; (2) Paleogene units mostly do not extend between the two sites, except the deformed sand unit (Units III [1166] and...
Authors
Tzvetina Erohina, Alan K. Cooper, D. A. Handwerger, Robert Dunbar
Synthetic seismograms linking ODP sites to seismic profiles, continental rise and shelf of Prydz Bay, Antarctica Synthetic seismograms linking ODP sites to seismic profiles, continental rise and shelf of Prydz Bay, Antarctica
Synthetic seismograms provide a crucial link between lithologic variations within a drill hole and reflectors on seismic profiles crossing the site. In essence, they provide a ground-truth for the interpretation of seismic data. Using a combination of core and logging data, we created synthetic seismograms for Ocean Drilling Program Sites 1165 and 1166, drilled during Leg 188, and Site...
Authors
D. A. Handwerger, Alan K. Cooper, P. E. O’Brien, T. Williams, S. R. Barr, A. Leventer, R. D. Jarrard
Prydz channel fan and the history of extreme ice advances in Prydz Bay Prydz channel fan and the history of extreme ice advances in Prydz Bay
During the late Neogene, the Lambert Glacier-Amery Ice Shelf drainage system flowed across Prydz Bay in an ice stream that reached the shelf edge and built a trough mouth fan on the upper continental slope. The adjacent banks saw mostly subglacial till deposition beneath slower-moving ice. The fan consists mostly of debris flow deposits derived from the melting out of subglacial debris...
Authors
P. E. O’Brien, Alan K. Cooper, F. Florindo, D. A. Handwerger, Michael J. Lavelle, S. Passchier, J. J. Pospichal, P. G. Quilty, Carl Richter, K. M. Theissen, J. M. Whitehead
Leg 188 synthesis: Transitions in the glacial history of the Prydz Bay region, East Antarctica, from ODP drilling Leg 188 synthesis: Transitions in the glacial history of the Prydz Bay region, East Antarctica, from ODP drilling
Drilling during Leg 119 (1988) and Leg 188 (2000; Sites 1165–1167) of the Ocean Drilling Program (ODP) provides direct evidence for long- and short-term changes in Cenozoic paleoenvironments in the Prydz Bay region. Cores from across the continental margin reveal that in preglacial times the present shelf was an alluvial plain system with austral conifer woodland in the Late Cretaceous...
Authors
Alan K. Cooper, P. E. O’Brien
Geochemistry of coastal tarbells in southern California: A tribute to I.R. Kaplan Geochemistry of coastal tarbells in southern California: A tribute to I.R. Kaplan
No abstract available.
Authors
Keith A. Kvenvolden, Frances D. Hostettler
Deep and bottom water export from the Southern Ocean to the Pacific over the past 38 million years Deep and bottom water export from the Southern Ocean to the Pacific over the past 38 million years
The application of radiogenic isotopes to the study of Cenozoic circulation patterns in the South Pacific Ocean has been hampered by the fact that records from only equatorial Pacific deep water have been available. We present new Pb and Nd isotope time series for two ferromanganese crusts that grew from equatorial Pacific bottom water (D137-01, "Nova," 7219 m water depth) and southwest...
Authors
T. van de Flierdt, M. Frank, A. N. Halliday, J.R. Hein, B. Hattendorf, D. Gunther, P.W. Kubik
Science support for salt pond restoration and management in south San Francisco Bay Science support for salt pond restoration and management in south San Francisco Bay
No abstract available.
Authors
Kathleen M. Swanson, Gregory Shellenbarger, Kathleen D. Henderson, Jeanne S. DiLeo, David H. Schoellhamer
Tracking contaminants down the Mississippi Tracking contaminants down the Mississippi
The Mississippi River and its last major downstream distributary, the Atchafalaya River, provide approximately 90 percent of the freshwater input to the Gulf of Mexico. Analyses of sediment cores using organic and inorganic tracers as well as bethic foraminifera appear to provide a reliable record of the historic variability of hypoxia in the northern Gulf of Mexico over the past few...
Authors
P. Swarzenski, P. Campbell