Tertiary Tectonics of the White Pine–Grant Range Region, East-Central Nevada, and Some Regional Implications

1968 ◽  
Vol 79 (12) ◽  
pp. 1703 ◽  
Author(s):  
E. M. MOORES ◽  
R. B. SCOTT ◽  
W. W. LUMSDEN
Keyword(s):  
White Pine ◽  
East Central

Nevadoceras, a new Early Permian adrianitid (Ammonoidea) from Nevada

1995 ◽  
Vol 69 (6) ◽  
pp. 1073-1079 ◽  
Author(s):  
Tamra A. Schiappa ◽  
Claude Spinosa ◽  
Walter S. Snyder
Keyword(s):  
New Genus ◽  
Early Permian ◽  
New Genus And Species ◽  
White Pine ◽  
East Central ◽  
Basinal Facies

The Early Permian (late Sakmarian to early Artinskian) adrianitid ammonoid Nevadoceras steelei new genus and species occurs in a fauna containing the ammonoids Properrinites Elias, Prothalassoceras Böse, Daraelites Gemmellaro, Almites Toumanskaya, Bamyaniceras Termier and Termier, Akmilleria Ruzhencev, Agathiceras Gemmellaro, Metalegoceras Schindewolf, Stenolobulites Mikesh, Glenister, and Furnish, Crimites Toumanskaya, Neocrimites Ruzhencev and the conodonts Sweetognathus whitei (Rhodes) and Mesogondolella bisselli (Clark and Behnken). This fauna occurs in a concretionary interval within micritic basinal facies of the Dry Mountain trough at Portuguese Springs, White Pine County, east-central Nevada.

scholarly journals Low-Density Management of White Pine Crop Trees: A Primer and Early Research Results

2007 ◽  
Vol 24 (4) ◽  
pp. 301-306 ◽  
Author(s):  
Robert S. Seymour
Keyword(s):  
Volume Growth ◽  
Stand Density ◽  
Low Density ◽  
White Pine ◽  
Short Term ◽  
East Central ◽  
High Production ◽  
Density Zone ◽  
Density Treatment ◽  
Tree Development

Abstract Growing white pines at low density after pruning appears to offer many advantages over more conventional silvicultural systems. This article describes how to design and implement a low-density thinning schedule using published relationships between crown architecture and stemwood growth; empirically, appropriate crown development can be maintained by keeping Wilson's spacing/height ratio between 0.4 (before thinning) and 0.5 (residual stand). Short-term results from a replicated thinning study in east central Maine show that diameter growth of heavily released crop trees was 2.8 times that of similar trees in the unthinned controls and 1.6 times that of similar trees in plots thinned to the B line on the pine stocking guide. Despite the important differences in tree development between thinning methods, total stemwood volume growth per acre of the low-density treatment was only 5% less (and not statistically different) than the B-line treatment. Gross stemwood growth was strongly and linearly related to four parameters of stand density; no evidence of an optimum density zone (the Langsaeter hypothesis) was found. The traditional B line on the white pine stocking guide is shown to have little relevance to either low-density or high-production thinning schedules and should be replaced by a more flexible, less prescriptive approach.

Coalescing upper-crust detachment faults as a major structural style in the Great Basin: Evidence from the White Pine and Horse Ranges, east-central Nevada, USA

2021 ◽  
Author(s):  
Robert D. Francis ◽  
Gregory J. Holk ◽  
Tor B. Lacy ◽  
Charles T. Walker
Keyword(s):  
Great Basin ◽  
Elevated Temperatures ◽  
Fundamental Problem ◽  
Essential Feature ◽  
Upper Crust ◽  
White Pine ◽  
East Central ◽  
Origin And Evolution ◽  
Detachment Faults ◽  
Detachment Faulting

ABSTRACT Determining the origin and evolution of basin-and-range geomorphology and structure in the western United States is a fundamental problem with global implications for continental tectonics. Has the extensional tectonic development of the Great Basin been dominated by steeply dipping (horst and graben) faulting or detachment faulting? The purpose of this paper is to provide evidence that attenuation due to multiple coalescing detachment faults has been a significant or dominant upper-crustal process in at least some areas of the Great Basin. We present mapping at a scale of 1:3000 and seismic refraction profiling of an area at the discontinuity between the White Pine and Horse Ranges, east-central Nevada, USA, which indicate the existence of a detachment rooted in an argillaceous ductile unit. This fault, which we call the Currant Gap detachment, coalesces with the previously mapped regional White Pine detachment. Our data suggest that the Currant Summit strike-slip fault at the surface, previously proposed to explain a nearly 2500 m east-west surface offset between the two ranges, likely does not exist. If a discontinuity exists at depth, it could be manifested at the surface by the undulating topography of the two coalescing detachments. On the other hand, offset domal uplifts in the two ranges would obviate the need for any lateral discontinuity at depth to explain the observed surface features. Our previous mapping of the White Pine detachment showed that it extends over the White Pine, Horse, and Grant Ranges and into Railroad Valley (total of 3000 km2). Accordingly, we propose a model of stacked, coalescing detachments above the metamorphic infrastructure; these detachments are regional and thus account for most of the basin-range relief and upper-crust extension in this area. An essential feature of our model is that these detachments are rooted in ductile units. Detachments that have been observed in brittle units could have initiated at a time when elevated temperatures or fluid flow enhanced the ductility of the rocks. The Currant Gap and White Pine detachments exhibit distinctive types of fluid-genetic silicified rocks. Study of such rocks in fault contacts could provide insights into the initiation and early history of detachment faulting as well as the migration of fluids, including petroleum.

Health Profile White Pine County, Nevada 2001

2002 ◽  
Author(s):  
Lei Chen ◽  
Drew Mather ◽  
Sherry Torgerson
Keyword(s):  
Health Profile ◽  
White Pine
Sign in / Sign up

Export Citation Format

Share Document