SKARN-GARNET ARCHIVES OF METASOMATIC AND HYDROTHERMAL CONDITIONS IN THE MINERAL KING ROOF PENDANT, SOUTH-CENTRAL SIERRA NEVADA

2016 ◽  
Author(s):  
Juliet Ryan-Davis ◽  
◽  
Jade Star Lackey ◽  
Megan D'Errico ◽  
Kouki Kitajima ◽  
...  
Keyword(s):  
Sierra Nevada ◽  
Hydrothermal Conditions ◽  
South Central

Lodgepole pine regeneration in an old, self-perpetuating forest in south central Oregon

1989 ◽  
Vol 19 (9) ◽  
pp. 1096-1104 ◽  
Author(s):  
John D. Stuart ◽  
James K. Agee ◽  
Robert I. Gara
Keyword(s):  
Sierra Nevada ◽  
Mountain Pine Beetle ◽  
Stand Structure ◽  
Lodgepole Pine ◽  
Disturbance Intensity ◽  
South Central ◽  
Mountain Pine ◽  
Pine Regeneration ◽  
Pine Beetle ◽  
Type Frequency

Historic regeneration patterns and regeneration requirements were investigated in an old, self-regenerating lodgepole pine (Pinusconforta Dougl. ssp. murrayana (Balf.) Critchfield) forest in south central Oregon. The forest was multiaged, with episodic regeneration pulses being correlated with mountain pine beetle (Dendroctonusponderosae Hopk.) outbreaks or fire. The magnitude of a regeneration pulse was a function of disturbance intensity. Tree ring indices show growth declines prior to mountain pine beetle outbreaks. Radial tree growth improved following disturbance. Differences in stand structure among climax lodgepole pine stands in the Rocky Mountains, Sierra Nevada, and south central Oregon were related to disturbance type, frequency, and intensity. Successful lodgepole pine reproduction was limited by soil moisture and partly by microclimate. Shading did not inhibit seedling establishment, but rather provided relief from excessive evapotranspiration, heat, and frost.

scholarly journals A continuous 4000-year lake-level record of Owens Lake, south-central Sierra Nevada, California, USA

2018 ◽  
Vol 90 (2) ◽  
pp. 276-302 ◽  
Author(s):  
Steven N. Bacon ◽  
Nicholas Lancaster ◽  
Scott Stine ◽  
Edward J. Rhodes ◽  
Grace A. McCarley Holder
Keyword(s):  
Water Level ◽  
Sierra Nevada ◽  
Lake Level ◽  
Water Levels ◽  
Mono Lake ◽  
Ice Age ◽  
Integrated Analysis ◽  
Owens Lake ◽  
South Central ◽  
Lake Core

AbstractReconstruction of lake-level fluctuations from landform and outcrop evidence typically involves characterizing periods with relative high stands. We developed a new approach to provide water-level estimates in the absence of shoreline evidence for Owens Lake in eastern California by integrating landform, outcrop, and existing lake-core data with wind-wave and sediment entrainment modeling of lake-core sedimentology. We also refined the late Holocene lake-level history of Owens Lake by dating four previously undated shoreline features above the water level (1096.4 m) in AD 1872. The new ages coincide with wetter and cooler climate during the Neopluvial (~3.6 ka), Medieval Pluvial (~0.8 ka), and Little Ice Age (~0.35 ka). Dates from stumps below 1096 m also indicate two periods of low stands at ~0.89 and 0.67 ka during the Medieval Climatic Anomaly. The timing of modeled water levels associated with 22 mud and sand units in lake cores agree well with shoreline records of Owens Lake and nearby Mono Lake, as well as with proxy evidence for relatively wet and dry periods from tree-ring and glacial records within the watershed. Our integrated analysis provides a continuous 4000-yr lake-level record showing the timing, duration, and magnitude of hydroclimate variability along the south-central Sierra Nevada.

Isozyme variation in Pinusmonticola

1983 ◽  
Vol 13 (6) ◽  
pp. 1122-1132 ◽  
Author(s):  
R. J. Steinhoff ◽  
D. G. Joyce ◽  
L. Fins
Keyword(s):  
British Columbia ◽  
Sierra Nevada ◽  
Species Distribution ◽  
Allelic Frequency ◽  
Isozyme Variation ◽  
Cascade Mountains ◽  
South Central ◽  
Expected Heterozygosity ◽  
Transition Area ◽  
Oregon Cascades

Seeds from 28 stands representing most of the range of Pinusmonticola Dougl. were analyzed for electrophoretically demonstrable variation in 10 proteins encoded by 12 genetic loci. On the average, 65% of the loci per stand were polymorphic, and expected heterozygosity of offspring was 18%. The populations could be assigned to two geographic groups, a broad northern one and a rather restricted southern one. The southern group consisted of populations from the Sierra Nevada and southern Cascade Mountains in northern California and from the Warner Mountains in south-central Oregon. These southern populations were similar to each other but all differed from those of the northern group in allelic frequency patterns for several isoenzymes. Across the northern part of the species' distribution (British Columbia, Washington, northern Oregon, Idaho, and Montana) differences among stands were minor and essentially random. Collections from stands in the central and southern Oregon Cascades and the Siskiyou Mountains of northwestern California were more nearly like the northern stands but exhibited some characteristics indicative of a transition area between the Sierra and northern types.

Chronology of late Cenozoic volcanic eruptions onto relict surfaces in the south-central Sierra Nevada, California

2011 ◽  
Vol 123 (5-6) ◽  
pp. 890-910 ◽  
Author(s):  
F. M. Phillips ◽  
W. C. McIntosh ◽  
N. W. Dunbar
Keyword(s):  
Sierra Nevada ◽  
Volcanic Eruptions ◽  
Late Cenozoic ◽  
The South ◽  
South Central

Spatiotemporal patterns of distributed slip in southern Owens Valley indicated by deformation of late Pleistocene shorelines, eastern California

2020 ◽  
Vol 132 (7-8) ◽  
pp. 1681-1703
Author(s):  
Steven N. Bacon ◽  
Thomas F. Bullard ◽  
Amanda K. Keen-Zebert ◽  
Angela S. Jayko ◽  
David L. Decker
Keyword(s):  
Sierra Nevada ◽  
Late Pleistocene ◽  
Spatiotemporal Patterns ◽  
Luminescence Dating ◽  
Fault System ◽  
Lake Basin ◽  
Extension Rate ◽  
Owens Valley ◽  
Beach Ridges ◽  
South Central

Abstract High-resolution elevation surveys of deformed late Pleistocene shorelines and new luminescence dating provide improved constraints on spatiotemporal patterns of distributed slip between normal and strike-slip faulting in southern Owens Valley, eastern California. A complex array of five subparallel faults, including the normal Sierra Nevada frontal fault and the oblique-normal Owens Valley fault, collectively form an active pull-apart basin that has developed within a dextral transtensional shear zone. Spatiotemporal patterns of slip are constrained by post–IR-IRSL (post-infrared–infrared stimulated luminescence) dating of a 40.0 ± 5.8 ka highstand beach ridge that is vertically faulted and tilted up to 9.8 ± 1.8 m and an undeformed suite of 11–16 ka beach ridges. The tectono-geomorphic record of deformed beach ridges and alluvial fans indicates that both normal and dextral faulting occurred between the period of ca. 16 and 40 ka, whereas dextral faulting has been the predominant style of slip since ca. 16 ka. A total extension rate of 0.7 ± 0.2 mm/yr resolved in the N72°E direction across all faults in Owens Lake basin is within error of geodetic estimates, suggesting extension has been constant during intervals of 101–104 yr. A new vertical slip rate of 0.13 ± 0.04 m/k.y. on the southern Owens Valley fault from deformed 160 ± 32 ka shoreline features also suggests constant slip for intervals up to 105 yr when compared to paleoseismic vertical slip rates from the same fault segment. This record supports a deformation mechanism characterized by steady slip and long interseismic periods of 8–10 k.y. where the south-central Owens Valley fault and Sierra Nevada frontal fault form a parallel fault system.

Association of the arboreal forage lichenBryoria fremontiiwithAbies magnificain the Sierra Nevada, California

2012 ◽  
Vol 42 (8) ◽  
pp. 1587-1596 ◽  
Author(s):  
Thomas R. Rambo
Keyword(s):  
Sierra Nevada ◽  
Positive Association ◽  
Mineral Nutrient ◽  
Nutrient Concentrations ◽  
Conifer Forest ◽  
Conifer Species ◽  
South Central ◽  
Mixed Conifer Forest ◽  
Sugar Pine ◽  
Needle Morphology

A strong positive association exists between Bryoria fremontii (Tuck.) Brodo & D. Hawksw. and red fir ( Abies magnifica A. Murray) in mixed-conifer forest of the south-central Sierra Nevada in California. The hypotheses that red fir microclimate, foliar leachate pH, mineral nutrients, and needle morphology may be especially favorable for B. fremontii were investigated in this study. There were no statistically significant differences in fall–winter–spring period within-crown vapor pressure deficits among five conifer species. In spring leachate solutions, NH4+and K+were significant indicators of red fir, which had generally greater ion concentrations than other species. Sugar pine ( Pinus lambertiana Douglas) leachate had the lowest pH. Mineral nutrient concentrations and acidity increased across species in fall samples. Growth and establishment of B. fremontii transplants were compared among the five conifer species. Grand mean annual transplant relative growth across conifer species was 6.28% with no statistically significant differences among species. Thallus retention in an establishment experiment was significantly greater in red fir than in shaded white fir ( Abies concolor (Gordon & Glend.) Hildebr. var. lowiana (Gordon) Lemmon) or the other three investigated conifers. The most important factor explaining the association of B. fremontii with red fir was the latter’s erect needle morphology.

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