Publications
Filter Total Items: 1333
Bermuda solution pipe soils: A geochemical evaluation of eolian parent materials
No abstract available.
Authors
Stanley R. Herwitz, Daniel R. Muhs
Geomorphic and geochemical evidence for the source of sand in the Algodones dunes, Colorado Desert, southeastern California
No abstract available.
Authors
D.R. Muhs, C. A. Bush, S.D. Cowherd, S. Mahan
Strontium isotope geochemistry of soil and playa deposits near Yucca Mountain, Nevada
The isotopic composition of strontium contained in the carbonate fractions of soils provides an excellent tracer which can be used to test models for their origin. This paper reports data on surface coatings and cements, eolian sediments, playas and alluvial fan soils which help to constrain a model for formation of the extensive calcretes and fault infillings in the Yucca Mountain region. The pla
Authors
Brian D. Marshall, Shannon A. Mahan
Geology and occurrence of radon
The accumulation of radon indoors is commonly due to movement of radon from adjacent soil and rock into a building foundation through joints, utility openings, cracks, or porous block walls. When air pressure inside the building is lower than that in the soil, pressure-driven flow of radonbearing soil gas can occur (see Chapter 2). Whether or not an indoor radon problem results depends on: (1) the
Authors
R. Randall Schumann, Linda C. Gundersen, A. B. Tanner
Preliminary U-series disequilibrium and thermoluminescence ages of surficial deposits and paleosols associated with Quaternary faults, eastern Yucca Mountain
No abstract available.
Authors
James B. Paces, Christopher M. Menges, B. Wildmann, J. R. Wesling, Charles A. Bush, Kiyoto Futa, H. T. Millard, P. B. Maat, John W. Whitney
Varve calibrated records of carbonate and organic carbon accumulation over the last 2000 years in the Black Sea
Sedimentologic and geochemical studies of box and gravity cores recovered from the Black Sea during the first leg of a multileg international Black Sea expedition in 1988 allow reconstruction of the basinwide Holocene environmental history of the Black Sea. In the deeper parts of the basin, box cores typically recovered a flocculent surface layer (“fluff”), laminated coccolith marls of Unit I (25–
Authors
Michael A. Arthur, Walter E. Dean, E.D. Neff, B.J. Hay, J. King, Glenn A. Jones
Preliminary map showing quaternary faults and landslides in the Cliff Lake 15' quadrangle, Madison County, Montana
No abstract available.
Authors
J. M. O'Neill, T. H. LeRoy, Paul E. Carrara
New uranium-series ages of the Waimanalo Limestone, Oahu, Hawaii: implications for sea level during the last interglacial period
The Waimanalo Formation (limestone) of Oahu has been correlated with the last interglacial period based on U-series dating of corals by T.-L. Ku and colleagues. The limestone consists of growth-position corals and overlying coral conglomerate. An apparent bimodal distribution of ages for the growth-position corals (mean age = 133 ka) and the overlying coral conglomerate (mean age = 119 ka) has bee
Authors
D.R. Muhs, B. J. Szabo
Magnetization and geochemistry of greigite-bearing Cretaceous strata, North Slope basin, Alaska
No abstract available.
Authors
Richard L. Reynolds, Michele L. Tuttle, Cynthia A. Rice, Neil S. Fishman, John A. Karachewski, David M. Sherman
U-Pb provenance ages of shocked zircons from the K-T boundary, Raton Basin, Colorado
No abstract available.
Authors
Wayne R. Premo, G. A. Izett
Precise U‐Pb ages of Duluth Complex and related mafic intrusions, northeastern Minnesota: Geochronological insights to physical, petrogenetic, paleomagnetic, and tectonomagmatic processes associated with the 1.1 Ga Midcontinent Rift System
Precise resolution of the timing of igneous activity is crucial to understanding the dynamic processes associated with continental rifting. Mafic intrusive rocks constitute a major portion of the exposed 1100 Ma (Keweenawan) Midcontinent Rift system in northeastern Minnesota; however, prior to this study, geochronological data were insufficient to allow rigorous interpretation of intrusive histori
Authors
James B. Paces, James D. Miller
Effects of hydrothermal alteration on the magnetization of the Oligocene Carpenter Ridge Tuff, Bachelor Caldera, San Juan Mountains, Colorado
Intracaldera Oligocene Carpenter Ridge Tuff fills the Bachelor caldera in the central San Juan caldera complex and hosts mineral deposits of the Creede mineral district. The Carpenter Ridge Tuff and unaltered portions of its intracaldera Bachelor Mountain Member, have strong, high‐coercivity, reverse magnetizations with average magnetic susceptibility (MS) and natural remanent magnetization (NRM)
Authors
Donald S. Sweetkind, Richard L. Reynolds, David A. Sawyer, Joseph G. Rosenbaum