Publications
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Changes in redox conditions in deep‐sea sediments of the subarctic North Pacific Ocean: Possible evidence for the presence of North Pacific Deep Water
Cores of upper Quaternary and Holocene sediment from the subarctic North Pacific north of about 48°N contain one or more layers of oxidized brown sediment interbedded within predominantly reduced green sediment. The brown layers are enriched in several trace elements, especially Mn, Mo, Ni, and Co, relative to the green layers. Where multiple oxidized layers are present, the intensity of the brown
Authors
Walter E. Dean, J. V. Gardner, Eileen Hemphill-Haley
Zircon geochronology of Precambrian rocks in southeastern Wyoming and northern Colorado
Archean gneisses and Early Proterozoic metasedimentary rocks of the Wyoming Province are separated from Proterozoic eugeoclinal metamorphic rocks by a major east-west–trending shear zone called the Cheyenne belt. U-Pb zircon ages of Archean tonalites north of the Cheyenne belt denote an intrusive event at 2,700 Ma. Detrital zircons from Proterozoic metasedimentary rocks north of the Cheyenne belt
Authors
Wayne R. Premo, W. R. Van Schmus
Pb isotopes in Anorthositic Breccias 67075 and 62237: A search for primitive lunar lead
No abstract available.
Authors
Wayne R. Premo, M. Tatsumoto, J. W. Wang
Uranium-series ages, faunal correlations and tectonic deformation of marine terraces within the Agua Blanca fault zone at Punta Banda, northern Baja California, Mexico
No abstract available.
Authors
T. K. Rockwell, D.R. Muhs, G. L. Kennedy, M.E. Hatch, S.M. Wilson, R.E. Klinger
Geologic map of the Trident Peak SW quadrangle, Humboldt County, Nevada
No abstract available.
Authors
Scott A. Minor, Michael Wager, Craig S. Harwood
Iron-sulfur-carbon relationships in organic-carbon-rich sequences I: Cretaceous Western Interior seaway
No abstract available.
Authors
Walter E. Dean, Michael A. Arthur
Morphology of Red Creek, Wyoming, an arid-region anastomosing channel system
The narrow, deep, and sinuous main channel is flanked by anastomosing flood channels, or anabranches. Most anabranches are initiated at meander bends. The primary mechanism of anabranch initiation is avulsion during overbank floods. -from Author
Authors
R. R. Schumann
Borax in the supraglacial moraine of the Lewis Cliff, Buckley Island quadrangle--first Antarctic occurrence
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) is a meteorite-stranding surface of ablating b
Authors
J. J. Fitzpatrick, D.R. Muhs
U-Th-Pb, Sm-Nd, Rb-Sr, and Lu-Hf systematics of Returned Mars Samples
No abstract available.
Authors
M. Tatsumoto, Wayne R. Premo
Stratigraphic evidence of Holocene faulting in the mid-continent: The Meers fault, southwestern Oklahoma
Stratigraphic relations and ten 14C ages show that movement occurred on the Meers fault in late Holocene time. Movement on the fault postdates the Browns Creek Alluvium, which began to be deposited between 14,000 and 13,000 yr B.P., and predates the East Cache Alluvium, which was deposited between 800 and 100 yr B.P. Surface warping along the fault led to local stream incision on the upthrown side
Authors
Richard F. Madole
A paleomagnetic investigation of rocks from the Ohio Range and the Dry Valleys, Transantarctic Mountains, Antarctica
Two well-defined virtual geomagnetic poles (VGPs) for East Antarctica were obtained from the Middle Jurassic Ferrar Dolerite, sampled from a thick sill on Mt Schopf in the Ohio Range, and from a horizontal sheet intruding Paleozoic granitic rocks at Mt Cerberus in the Dry Valleys. The VGP from the sill at Mt Schopf lies at lat. 58°.0S, long. 129°.0W (dm=13°, dp=12°), and the VGP from Mt Cerberus l
Authors
Karl S. Kellogg
Sediment deposition in the Late Holocene abyssal Black Sea with climatic and chronological implications
The temporal sedimentary patterns in the Late Holocene central eastern and western Black Sea are very similar. The sedimentary history was most visibly affected by the coccolithophorid species Emiliania huxleyi which briefly invaded the Black Sea for the first time (“First Invasion Period”), nearly disappeared again shortly afterwards (“Transition Sapropel”), but returned permanently several centu
Authors
B.J. Hay, M.A. Arthur, Walter E. Dean, E.D. Neff, S. Honjo