| Geomorphic Studies and Hazard Evaluation of Negit Island and Mammoth Mountain, Long Valley Caldera, California |
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from the dept. Long Valley Caldera, California, has undergone four distinct eruptive sequences over the last 160,000 years. Mammoth Mountain, a cumulovolcano emplaced during the Mammoth sequence (119-57 ka), and Negit Island, a small island in Mono Lake (generated during the Inyo sequence, 6 ka—present), are especially important because they represent the most recent volcanic activity in the region. My research will focus on mapping and petrological analysis of both Negit Island and Mammoth Mountain.... Long Valley Caldera, California, has undergone four distinct eruptive sequences over the last 160,000 years. Mammoth Mountain, a cumulovolcano emplaced during the Mammoth sequence (119-57 ka), and Negit Island, a small island in Mono Lake (generated during the Inyo sequence, 6 ka—present), are especially important because they represent the most recent volcanic activity in the region. Neither Mammoth Mountain nor Negit Island has been mapped in detail. In both locations, a time line of events will be assembled to determine whether there has been any recent activity (i.e. activity outside of the established sequences). Geologic maps of both Mammoth and Negit will be compiled in order to provide an up-to-date snapshot of recent volcanic activity in the region. Additional petrological and geochemical analyses will provide further insight, not only into the magma system proper, but also into the capacity for future activity. < | >
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