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Field Guides

Ten stops were chosen from published scientific field guides and from California Volcano Observatory field trip notes to represent the geology of the area.

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Long Valley Caldera Field Guide

Ten stops were chosen from published scientific field guides and from California Volcano Observatory field trip notes to represent the geology of the area.
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Long Valley Caldera Field Guide

Ten stops were chosen from published scientific field guides and from California Volcano Observatory field trip notes to represent the geology of the area.
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Vertical columns of volcanic rock at Devils Postpile National Monument

A spectacular display of a columnar-jointed basalt flow.
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Long Valley Caldera Field Guide - Glass Creek Flow

Example of two magmas that mixed during an eruption.
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Long Valley Caldera Field Guide - Glass Creek Flow

Example of two magmas that mixed during an eruption.
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Long Valley Caldera Field Guide - Horseshoe Lake

Volcanic carbon dioxide can kill trees and is a hazard to animal life.
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Long Valley Caldera Field Guide - Horseshoe Lake

Volcanic carbon dioxide can kill trees and is a hazard to animal life.
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Long Valley Caldera Field Guide - Hot Creek Geologic Site

Blue pools and impressive boiling fountains along Hot Creek.
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Long Valley Caldera Field Guide - Hot Creek Geologic Site

Blue pools and impressive boiling fountains along Hot Creek.
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Long Valley Caldera Field Guide - Inyo Craters

Three young (1350 CE) craters formed by phreatic, or steam-driven, eruptions.
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Long Valley Caldera Field Guide - Inyo Craters

Three young (1350 CE) craters formed by phreatic, or steam-driven, eruptions.
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Long Valley Caldera Field Guide - Lookout Mountain

A good vantage point for viewing the region.
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Long Valley Caldera Field Guide - Mammoth Mountain

Hike, ski, or bike on a series of domes. A good vantage point for seeing entire Caldera.
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Long Valley Caldera Field Guide - Mammoth Mountain

Hike, ski, or bike on a series of domes. A good vantage point for seeing entire Caldera.
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Long Valley Caldera Field Guide - Mono Lake

A beautiful saline lake with tufa towers.
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Long Valley Caldera Field Guide - Obsidian Dome

At the top of an obsidian dome, view rocks that look different but have the same composition.
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Long Valley Caldera Field Guide - Obsidian Dome

At the top of an obsidian dome, view rocks that look different but have the same composition.
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Long Valley Caldera Field Guide - Panum Crater

A tephra ring and dome, plus pumice and banded obsidian.
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Long Valley Caldera Field Guide - Panum Crater

A tephra ring and dome, plus pumice and banded obsidian.
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