Publications
Filter Total Items: 1492
Uranium-series age estimates of corals from Quaternary marine sediments of southern Florida Uranium-series age estimates of corals from Quaternary marine sediments of southern Florida
No abstract available.
Authors
D.R. Muhs, Barney J. Szabo, L. McCartan, P.B. Maat, C. A. Bush, R. B. Halley
Aminostratigraphy and oxygen isotope stratigraphy of marine terrace deposits, Palos Verdes Hills and San Pedro areas, Los Angeles County, California Aminostratigraphy and oxygen isotope stratigraphy of marine terrace deposits, Palos Verdes Hills and San Pedro areas, Los Angeles County, California
No abstract available.
Authors
D.R. Muhs, G. H. Miller, J. F. Whelan, G. L. Kennedy
Strontium isotope geochemistry of calcite fracture fillings in deep core, Yucca Mountain, Nevada--A progress report Strontium isotope geochemistry of calcite fracture fillings in deep core, Yucca Mountain, Nevada--A progress report
No abstract available.
Authors
Zell E. Peterman, John S. Stuckless, Brian D. Marshall, Shannon A. Mahan, Kiyoto Futa
Relations among hydrocarbon reservoirs, epigenetic sulfidization, and rock magnetization; Examples from the South Texas coastal plain Relations among hydrocarbon reservoirs, epigenetic sulfidization, and rock magnetization; Examples from the South Texas coastal plain
This paper focuses on the association between concentrations of iron disulfide (FeS 2 ) minerals in the shallow subsurface and underlying hydrocarbon accumulations. Such FeS 2 concentrations are the result of migration of either H 2 S or organic constituents from the underlying hydrocarbons. The H 2 S from reservoirs is produced inorganically from sulfate in the reservoir rocks at high...
Authors
Martin B. Goldhaber, Richard L. Reynolds
Holocene Treeline Fluctuations in the Northern San Juan Mountains, Colorado, U.S.A., as Indicated by Radiocarbon-Dated Conifer Wood Holocene Treeline Fluctuations in the Northern San Juan Mountains, Colorado, U.S.A., as Indicated by Radiocarbon-Dated Conifer Wood
An early to mid-Holocene warm period with greater than present-day monsoonal circulation is indicated by evidence in the northern San Juan Mountains of southwestern Colorado. Fifty radiocarbon ages of coniferous wood fragments, and several other radiocarbon ages of willow fragments, woody peat, and organic sediment associated with conifer remains, recovered from six sites at or above...
Authors
Paul E. Carrara, Deborah A. Trimble, Meyer Rubin
U-Th-Pb Isotopic Systematics of Lunar Norite 78235 U-Th-Pb Isotopic Systematics of Lunar Norite 78235
No abstract available.
Authors
Wayne R. Premo, M. Tatsumoto
U-Pb isotopic characteristics of lunar meteorites Yamato-793274 and Yamato-86032 U-Pb isotopic characteristics of lunar meteorites Yamato-793274 and Yamato-86032
No abstract available.
Authors
Mistunobu Tatsumoto, Wayne R. Premo
Quaternary history of some southern and central Rocky Mountain basins Quaternary history of some southern and central Rocky Mountain basins
This chapter summarizes the current state of late Cenozoic stratigraphic knowledge in some Rocky Mountain basins (here defined as the structurally low portions of major drainage basins) that have been studied in detail since Scott’s (1965) summary on the nonglacial history of the southern and middle Rocky Mountains. The Quaternary history of few of these basins has been studied as...
Authors
Marith C. Reheis, Robert C. Palmquist, S.S. Agard, Cheryl Jaworowski, Brainerd Mears, Richard F. Madole, Alan R. Nelson, Gerald Osborn
Amino acid dating of fossil mollusks Amino acid dating of fossil mollusks
No abstract available.
Authors
D.R. Muhs
Assessing the natural performance of felsic tuffs using the Rb-Sr and Sm-Nd systems-A study of the altered zone in the Topopah Spring Member, Paintbrush Tuff, Yucca Mountain, Nevada Assessing the natural performance of felsic tuffs using the Rb-Sr and Sm-Nd systems-A study of the altered zone in the Topopah Spring Member, Paintbrush Tuff, Yucca Mountain, Nevada
Core samples of the Topopah Spring Member of the Paintbrush Tuff from drill hole UE25A#1 were analyzed for Sr and Nd isotopes and selected minor and trace elements to constrain the origin of a zcolitized zone associated with the lower vitrophyre. The Sm-Nd radiogenic isotope system was unperturbed by the alteration, but the Rb-Sr system was severely disturbed in the altered zone. The...
Authors
Zell E. Peterman, Richard W. Spengler, Kiyoto Futa, Brian D. Marshall
Age estimates and uplift rates for late Pleistocene marine terraces: Southern Oregon portion of the Cascadia forearc Age estimates and uplift rates for late Pleistocene marine terraces: Southern Oregon portion of the Cascadia forearc
Interest in the Cascadia subduction zone has increased because recent investigations have suggested that slip along plates at certain types of convergent margins is characteristically accompanied by large earthquakes. In addition, other investigations have suggested that convergent margins can be broadly classified by the magnitude of their uplift rates. The authors generated new uranium...
Authors
Daniel R. Muhs, Harvey M. Kelsey, Joseph F. Whelan, Galan W. McInelly