Mountain in Oregon
Pine Mountain is a rhyolitic mountain east of Bend and south of U.S. Route 20 (US 20) in eastern Deschutes County , Oregon , United States .[ 3] It is the site of an astronomical observatory called the Pine Mountain Observatory .[ 4] The mountain is a part of the Deschutes Formation (which is related to Cascade volcanism) and is the southeasternmost exposure of the formation and is of similar age to Cline Buttes .[ 2] Pine Mountain is also well known for its spectacular "glass off" weather conditions which are ideal for paragliding.[ 4]
Geology
Pine Mountain shows considerable erosion and is covered with thick soil deposits.[ 3] The mountain consists of basalt , rhyolite, andesite and dacite .[ 5] [ 6] Dunes mark the northwest flank of the mountain, consisting of pumiceous dust and lapilli .[ 7]
History
On September 17, 1984 a large fireball was seen from the Pine Mountain Observatory heading northeasterly before breaking into six orange fragments.[ 8]
References
^ a b "Pine Mountain" . Geographic Names Information System . United States Geological Survey , United States Department of the Interior . Retrieved February 13, 2018 .
^ a b Ford, Mark T; Grunder, Anita L ; Duncan, Robert A (2013). "Bimodal volcanism of the High Lava Plains and Northwestern Basin and Range of Oregon: Distribution and tectonic implications of age-progressive rhyolites" . Geochemistry, Geophysics, Geosystems . 14 (8): 2836–57. doi :10.1002/ggge.20175 .
^ a b "Geology and Mineral Resources of Deschutes County, Oregon" (PDF) . OregonGeology.org . Retrieved 2018-01-04 .
^ a b "Paragliding Evening Glass Off" . alpenglow.org . Retrieved 2018-01-04 .
^ Higgins, Michael W.; Waters, Aaron C. (March 1967). "Newberry Caldera, Oregon: A Preliminary Report". The Ore Bin . 29 (3): 37–60. CiteSeerX 10.1.1.614.3401 .
^ "Newberry Volcano, Oregon: A Cascade Range geothermal prospect" (PDF) . OregonGeology.org . Retrieved 2018-01-04 .
^ "Preliminary Report on the Geology and Water Resources of Central Oregon" (PDF) . PUBS.USGS.GOV . Retrieved 2018-01-04 .
^ "Large fireball sighted in Pacific Northwest: More information needed" (PDF) . OregonGeology.org . Retrieved 2018-01-04 .