The post-Mazama northwest rift zone eruption at Newberry Volcano, Oregon
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Abstract
The northwest rift zone (NWRZ) eruption took place at Newberry Volcano ~7000 years ago after the volcano was mantled by tephra from the catastrophic eruption that destroyed Mount Mazama and produced the Crater Lake caldera. The NWRZ eruption produced multiple lava flows from a variety of vents including cinder cones, spatter vents, and fissures, possibly in more than one episode. Eruptive behaviors ranged from energetic Strombolian, which produced significant tephra plumes, to low-energy Hawaiian-style. This paper summarizes and in part reinterprets what is known about the eruption and presents information from new and ongoing studies. Total distance spanned by the eruption is 32 km north-south. The northernmost flow of the NWRZ blocked the Deschutes River upstream from the city of Bend, Oregon, and changed the course of the river. Renewed mafic activity in the region, particularly eruptions such as the NWRZ with tephra plumes and multiple lava flows from many vents, would have significant impacts for the residents of Bend and other central Oregon communities.
| Publication type | Book chapter |
|---|---|
| Publication Subtype | Book Chapter |
| Title | The post-Mazama northwest rift zone eruption at Newberry Volcano, Oregon |
| DOI | 10.1130/2009.fld015(05) |
| Volume | 15 |
| Year Published | 2009 |
| Language | English |
| Publisher | Geological Society of America |
| Publisher location | Boulder, CO |
| Contributing office(s) | Volcano Science Center |
| Description | 20 p. |
| Larger Work Type | Book |
| Larger Work Subtype | Monograph |
| Larger Work Title | Volcanoes to vineyards: Geologic field trips through the dynamic landscape of the Pacific Northwest (GSA Field Guides 15) |
| First page | 91 |
| Last page | 110 |
| Country | United States |
| State | Oregon |
| Other Geospatial | Newberry Volcano |
| Online Only (Y/N) | N |
| Additional Online Files (Y/N) | N |
| Google Analytic Metrics | Metrics page |