Publications
Filter Total Items: 1340
Hydrologic and geologic characteristics of the Yucca Mountain site relevant to the performance of a potential repository; Day 2, Beatty to Yucca Mountain; Stop 7B, Secondary minerals and paleohydrologic implications
No abstract available.
Authors
Leonid A. Neymark, James B. Paces, Zell E. Peterman, B. M. Marshall, Joseph F. Whelan
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 western Nort
Authors
R.S. Thompson, K. H. Anderson
Geochemical evidence for an Eolian sand dam across the North and South Platte rivers in Nebraska
Geochemical and geomorphic data from dune fields in southwestern Nebraska provide new evidence that the Nebraska Sand Hills once migrated across the North and South Platte rivers and dammed the largest tributary system to the Missouri River. The Lincoln County and Imperial dune fields, which lie downwind of the South Platte River, have compositions intermediate between the Nebraska Sand Hills (qua
Authors
Daniel R. Muhs, James B. Swinehart, David B. Loope, Josh Been, Shannon Mahan, Charles A. Bush
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 individua
Authors
Stephen F. Personius, Shannon Mahan
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 measureme
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
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 species w
Authors
Robert S. Thompson, Katherine H. Anderson, Patrick J. Bartlein, Sharon A. Smith
An evaluation of methods for identifying and interpreting buried soils in late Quaternary loess in Alaska: A section in Geologic studies in Alaska by the U.S. Geological Survey, 1998
The presence of buried soils in Alaskan loess is controversial, and therefore criteria for identifying buried soils in these deposits need to be evaluated. In this paper, morphologic and chemical criteria for identifying buried soils are evaluated by studying modern soils developed mostly in Holocene loess under tundra, boreal forest, and transitional coastal-boreal forest vegetation in different
Authors
Daniel R. Muhs, Thomas A. Ager, Josh M. Been, Joseph G. Rosenbaum, Richard J. Reynolds
Postglacial vegetation history of the Kachemak Bay area, Cook Inlet, south-central Alaska: A section in Geologic studies in Alaska by the U.S. Geological Survey, 1998
Pollen records from two sites on the north shore of Kachemak Bay, south-central Alaska, provide the first radiocarbon-dated histories of postglacial vegetation development for southern Cook Inlet. During the late Wisconsin glacial interval, glaciers covered most of Cook Inlet. Deglaciation of Kachemak Bay began prior to 13,000 yr B.P. Pollen evidence indicates that a pioneering herbaceous tundra b
Authors
Thomas A. Ager
Dating marine terraces with relative-age and correlated-age methods
No abstract available.
Authors
D.R. Muhs
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
No abstract available.
Authors
James B. Paces, Zell E. Peterman
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 the minim
Authors
R.S. Thompson, K. H. Anderson, P. J. Bartlein