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Showing 1 to 13 of 13 for “"Valles Caldera"”.
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The Valles Caldera: Recreationists' Perspectives on Access and Management
With the public acquisition of Valles Caldera National Preserve in 2000, Congress granted management to a Board of Trustees, a unique experiment in public land management. Ten years into the experiment, the trust model has been failing to meet certain management objectives and is under pressure by …
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Land Cover Change During a Transition in Land Management at Valles Caldera 1989-2013
… in public lands management by creating the Valles Caldera National Preserve and its governing body, the Valles Caldera Trust (VCT). The management approach enacted by Valles Caldera Trust marked a significant departure in land-use intensity. To assess how these changes in management have …
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A GIS-Based Volcanic Hazard and Risk Assessment of Eruptions Sourced within Valles Caldera, New Mexico
<p>Valles caldera, in north-central New Mexico, is considered one of the largest rhyolitic volcanoes in the United States due to the great amount of volcanic activity over the last 1.61 Ma. Although Valles caldera is currently dormant, there is potential for future volcanic activity, and therefore …
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Seismic Q and velocity structure for the magma-hydrothermal system of the Valles Caldera, New Mexico
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1989.
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Investigation into possible factors affecting the recruitment of Rocky Mountain elk on the Valles Caldera national preserve
The Valles Caldera National Preserve (VCNP) is a relatively new public land holding located in the Jemez Mountains in north-central New Mexico. For the past decade, low calf:cow ratios of elk (Cervus elaphus) have been recorded on the VCNP prompting concern by both the Valles Caldera Trust, the …
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Application of the fission-track dating method to evaluate the thermal history of three geothermal areas, North Kurikoma(Japan), Hijiori(Japan) and Valles caldera(USA)
本文データは平成22年度国立国会図書館の学位論文(博士)のデジタル化実施により作成された画像ファイルを基にpdf変換したものである
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CARBONIC SPRINGS AS DISTAL MANIFESTATIONS OF THE JEMEZ GEOTHERMAL SYSTEM, SAN YSIDRO, NEW MEXICO, HIGHLIGHTING THE IMPORTANCE OF FAULT PATHWAYS AND HYDROCHEMICAL MIXING.
… high topography, and/or influence from the Valles Caldera geothermal system of the Jemez Mountains. Numerous geochemical plots show that all three carbonic spring groups are very different than meteoric and sedimentary aquifer waters. The springs are warm (20oC) to hot (60oC) and all deposit …
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Uranium-series geochronology and stable isotope analysis of travertine from Soda Dam, New Mexico : a Quaternary record of episodic spring discharge and rivern incision in the Jemez Mountains hydrothermal system
… Soda Dam, and a paleohydrologic record for the Valles Caldera hydrothermal system in Northern New Mexico for at least the last 500 ka. Travertine-depositing springs occur in San Diego Canyon, the only surface drainage outlet for the Valles Caldera, along the intersection of the Jemez fault zone …
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Oxygen isotopes in diatom silica : a new understanding of silica-water oxygen isotope fractionation in diatom frustules and an application of diatom d180 values as a record of paleohydrologic variability in a middle-Pleistocene lacrustine core from the Valles Caldera, New Mexico
… frustules from a lacustrine setting in the Valles Caldera, New Mexico resulting in an increase of ~7.4° in the d18O values. The rapid post-mortem alteration of diatom d18O values explains much of the disparate data regarding silica-water fractionation for diatom silica and has profound …
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Magnetic records from latest Triassic to earliest Jurassic red beds, Utah and Arizona, and from mid-Pleistocene lake beds, New Mexico
… lake sedimentary record obtained from the Valles Caldera, northern New Mexico was investigated using rock magnetic and paleomagnetic techniques. Lake sediments span three glacial and two interglacial intervals, MIS 14 – 10. Both detrital and diagenetic phases are preserved in sediment …
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Prelude to the Tshirege caldera-forming eruption of the Bandelier magmatic system, New Mexico, USA
Two caldera-forming eruptions have occurred in the Bandelier magmatic system of the Jemez Mountains of northern New Mexico, the latter of which formed Valles caldera during the Tshirege eruption at 1232 ka. Despite no eruptions at Valles in the last ca. 70 kyr, the presence of partially molten …
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Geochemical characteristics and microbial diversity of CO2-rich mound springs of the Tierra Amarilla anticline, New Mexico
… perhaps related to distal effects of the Valles Caldera hydrothermal system with fluid transport up and along extensional faults networks near the boundary of the Rio Grande rift. Microbiological techniques were employed to investigate these waters and determine species diversity and …