![Tephra / Petrology / Igneous rocks / John Day Formation / John Day Fossil Beds National Monument / Yellowstone hotspot / Tuff / Ochoco Mountains / Pyroclastic rock / Geology / Volcanic rocks / Volcanology Tephra / Petrology / Igneous rocks / John Day Formation / John Day Fossil Beds National Monument / Yellowstone hotspot / Tuff / Ochoco Mountains / Pyroclastic rock / Geology / Volcanic rocks / Volcanology](https://www.pdfsearch.io/img/e4777814e45305e9b63ddb9b3cfe0e70.jpg)
| Document Date: 2013-06-02 18:11:01 Open Document File Size: 1,26 MBShare Result on Facebook
City Prineville / / Continent AMERICA / / Event Natural Disaster / Environmental Issue / / NaturalFeature Hills Clarno Tower Mtn / Tower Mountain / Picture Gorge Basalts Picture Gorge / Painted Hills / Wildcat Mountain / Ochoco Mountains / Crooked River / Gorge Basalts Ochoco Mtns Sheep Rock Rattlesnake Ignimbrite / / Organization National Park Service U.S. Department of the Interior / / Person Rattlesnake Ashflow Tuff / Rattlesnake Fm / Sheep Rock / / ProvinceOrState Nevada / Oregon / / Region western North America / eastern Oregon / central Oregon / /
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