Publications
Filter Total Items: 1459
Coordinated strike-slip and normal faulting in the Southern Ozark dome of Northern Arkansas: Deformation in a late Paleozoic foreland Coordinated strike-slip and normal faulting in the Southern Ozark dome of Northern Arkansas: Deformation in a late Paleozoic foreland
Structures that formed on the southern flank of the Ozark dome, in the foreland of the late Paleozoic Ouachita orogeny, have received little modern study. New mapping of the western Buffalo River region of northern Arkansas identifies diversely oriented faults and monoclinal folds that displace the generally flat lying Mississippian Boone Formation over a 180 m elevation range. Kinematic
Authors
M.R. Hudson
Atlas of relations between climatic parameters and distributions of important trees and shrubs in North America; additional conifers, hardwoods, and monocots Atlas of relations between climatic parameters and distributions of important trees and shrubs in North America; additional conifers, hardwoods, and monocots
This volume explores the continental-scale relations between climate and the geographic ranges of woody plant species in North America. A 25-km equal-area grid of modern climatic and bioclimatic parameters for North America was constructed from instrumental weather records. The geographic distributions of selected tree and shrub species were digitized, and the presence or absence of each...
Authors
Robert S. Thompson, Katherine H. Anderson, Patrick J. Bartlein, Sharon A. Smith
Biomes of western North America at 18,000, 6000 and 0 14C yr BP reconstructed from pollen and packrat midden data Biomes of western North America at 18,000, 6000 and 0 14C yr BP reconstructed from pollen and packrat midden data
A new compilation of pollen and packrat midden data from western North America provides a refined reconstruction of the composition and distribution of biomes in western North America for today and for 6000 and 18,000 radiocarbon years before present (14C yr BP). Modern biomes in western North America are adequately portrayed by pollen assemblages from lakes and bogs. Forest biomes in...
Authors
R.S. Thompson, K. H. Anderson
Paleoearthquake recurrence on the East Paradise fault zone, metropolitan Albuquerque, New Mexico Paleoearthquake recurrence on the East Paradise fault zone, metropolitan Albuquerque, New Mexico
A fortuitous exposure of the East Paradise fault zone near Arroyo de las Calabacillas has helped us determine a post-middle Pleistocene history for a long-forgotten Quaternary fault in the City of Albuquerque, New Mexico. Mapping of two exposures of the fault zone allowed us to measure a total vertical offset of 2.75 m across middle Pleistocene fluvial and eolian deposits and to estimate
Authors
Stephen F. Personius, Shannon Mahan
Pb Isotopic Systematics of Lunar Highland Rocks (>3.9 Ga): Constraints on Early Lunar Evolution Pb Isotopic Systematics of Lunar Highland Rocks (>3.9 Ga): Constraints on Early Lunar Evolution
No abstract available.
Authors
Wayne R. Premo, M. Tatsumoto, Keiji Misawa, N. Nakamura, N. Kita
Isotope hydrology of ground-water flow systems, southern Nevada Isotope hydrology of ground-water flow systems, southern Nevada
No abstract available.
Authors
James B. Paces, Zell E. Peterman
Quantitative paleoclimatic reconstructions from late Pleistocene plant macrofossils of the Yucca Mountain region Quantitative paleoclimatic reconstructions from late Pleistocene plant macrofossils of the Yucca Mountain region
Plant macrofossil assemblages recovered from packrat (Neotoma) middens of late Pleistocene age from the present-day Mojave Desert of southern Nevada contain plant species that today live at higher elevations and/or farther north than the midden collection sites. Previous reconstructions of late Pleistocene climates from packrat midden assemblages in this region (Spaulding, 1985) assessed...
Authors
R.S. Thompson, K. H. Anderson, P. J. Bartlein
Atlas of relations between climatic parameters and distributions of important trees and shrubs in North America Atlas of relations between climatic parameters and distributions of important trees and shrubs in North America
This atlas explores the continental-scale relations between the geographic ranges of woody plant species and climate in North America. A 25-km equal-area grid of modern climatic and bioclimatic parameters was constructed from instrumental weather records. The geographic distributions of selected tree and shrub species were digitized, and the presence or absence of each species was...
Authors
Robert S. Thompson, Katherine H. Anderson, Patrick J. Bartlein
Constraints on Quaternary unsaturated- and saturated-zone hydrology from geochronological and isotopic studies of calcite and silica, Yucca Mountain, Nevada Constraints on Quaternary unsaturated- and saturated-zone hydrology from geochronological and isotopic studies of calcite and silica, Yucca Mountain, Nevada
No abstracts available.
Authors
James B. Paces, Zell E. Peterman, Leonid A. Neymark, J. F. Whelan, Brian D. Marshall
Conditions for bubble elongation in cold ice-sheet ice Conditions for bubble elongation in cold ice-sheet ice
Highly elongated bubbles are sometimes observed in ice-sheet ice. Elongation is favored by rapid ice deformation, and opposed by diffusive processes. We use simple models to show that vapor transport dominates diffusion except possibly very close to the melting point, and that latent-heat effects are insignificant. Elongation is favored by larger bubbles at pore close-off, but is nearly
Authors
R. B. Alley, J. J. Fitzpatrick
Sand dunes of the northern Great Plains of Canada and the United States Sand dunes of the northern Great Plains of Canada and the United States
No abstract available.
Authors
D.R. Muhs, S.A. Wolfe