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A geologist crouches next to a rhyolite outcrop and points to an egg-shaped mass of radiating pink minerals about the size of a cantaloupe. The rest of the rock is pocked with other egg to grapefruit sized pink crystal masses, interspersed with chunky fragments of black glassy lava.
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Large spherulites in Hot Creek rhyolite lava in the Long Valley Caldera
A broad, flat plain covered in dull green sagebrush stretches away from the viewer in this panorama. The photo is being taken from a rocky hill, with snow-capped, sharp peaks on the far side of the plain and low raised hills on the right side of the photo. One geologist is sitting on the rocks at lower right and one geologist is standing and giving a peace sign.
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Panoramic view of the Long Valley Caldera from its north side
Eddy covariance station at Mammoth Mountain, California
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Eddy covariance station at Mammoth Mountain, California
A simplified geologic map of the Long Valley Caldera, showing post-caldera rhyolite lava flows in various colors, concentrated on the W half of a long ellipsoidal caldera. The topographic caldera margin is shown in part with a dashed line surrounding the lavas and the structural caldera margin (ring fault), shown with a dotted line.
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Long Valley Caldera map
banding of Panum pumice and obsidian
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Flow banding of Panum pumice and obsidian
Model of reservoirs underneath Long Valley Caldera...
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Model of reservoirs underneath Long Valley Caldera