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Long Valley Caldera map

By California Volcano Observatory 2017 (approx.)
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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Detailed Description

Map showing distribution of Long Valley postcaldera rhyolites. Abbreviations: CD, Casa Diablo geothermal plant; Ski area, Mammoth Mountain Ski Area; LVEW, Long Valley Exploratory Well, 3 km deep, located high on resurgent uplift; s, surficial deposits filling structural lows on resurgent uplift. Reproduced from USGS SIR 2017-5022-L, Figure 7 (https://pubs.usgs.gov/sir/2017/5022/l/sir20175022l.pdf)

Sources/Usage

Public Domain.