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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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obsidian
Making sense of brittle deformation in rhyolitic lavas: Insights from Obsidian Dome, California, USA
Why aplites freeze and rhyolites erupt: Controls on the accumulation and eruption of high-SiO 2 (eutectic) melts
Accounting for the species-dependence of the 3500 cm –1 H 2 O t infrared molar absorptivity coefficient: Implications for hydrated volcanic glasses
Mineralogical, petrographic and chemical analysis of geomaterials used in the mortars of Roman Nora theatre (south Sardinia, Italy)
Nonequilibrium degassing, regassing, and vapor fluxing in magmatic feeder systems
Spherulites as in-situ recorders of thermal history in lava flows
Archaeometric characterization of Proto-Byzantine glass workshop from the Roman amphitheatre of Catania (Sicily, Italy)
Experiments and models on H 2 O retrograde solubility in volcanic systems
Exploring the effect of lithium on pegmatitic textures: An experimental study
Adsorption of sulfur dioxide on volcanic ashes
HEAT TRANSPORT PROPERTIES OF CRISTOBALITE AND DISCUSSION OF “SNOWFLAKE” FORMATION
Multi-technique geochemical characterization of the Alca obsidian source, Peruvian Andes
Pathways of volcanic glass alteration in laboratory experiments through inorganic and microbially-mediated processes
(U-Th)/He zircon and archaeological ages for a late prehistoric eruption in the Salton Trough (California, USA)
Bubble geobarometry: A record of pressure changes, degassing, and regassing at Mono Craters, California
Melt fracturing and healing: A mechanism for degassing and origin of silicic obsidian
The hydration and alteration of perlite and rhyolite
A field guide to Newberry Volcano, Oregon
Abstract Newberry Volcano is located in central Oregon at the intersection of the Cascade Range and the High Lava Plains. Its lavas range in age from ca. 0.5 Ma to late Holocene. Erupted products range in composition from basalt through rhyolite and cover ~3000 km 2 . The most recent caldera-forming eruption occurred ~80,000 years ago. This trip will highlight a revised understanding of the volcano's history based on new detailed geologic work. Stops will also focus on evidence for ice and flooding on the volcano, as well as new studies of Holocene mafic eruptions. Newberry is one of the most accessible U.S. volcanoes, and this trip will visit a range of lava types and compositions including tholeiitic and calc-alkaline basalt flows, cinder cones, and rhyolitic domes and tuffs. Stops will include early distal basalts as well as the youngest intracaldera obsidian flow.