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Newberry Volcano | John Seach
Oregon, USA
43.722 N, 121.229 W
summit elevation 2434 m
Shield volcano
Several hundred thousand years ago, a series of eruptions created a caldera now called the Newberry Crater.
About 1,500 years ago the volcano displayed its geothermal potential by blasting ash and glassy magma, creating what is known today as the "Big Obsidian Flow."
Further Reading
MacLeod, N.S. and Sherrod, D.R., 1988. Geologic evidence for a magma chamber beneath Newberry Volcano, Oregon. Journal of Geophysical Research: Solid Earth, 93(B9), pp.10067-10079.
Higgins, M.W., 1973. Petrology of Newberry volcano, central Oregon. Geological Society of America Bulletin, 84(2), pp.455-488.
Newberry Volcano Eruptions
690 AD ± 100, 490 AD ± 100, 1450 BC?, 4450 BC?, 4690 BC ± 150, 4770 BC ± 75, 4860 BC ± 150, 4960 BC ± 100, 5070 BC ± 150, 5260 BC ± 150, 9210 BC ± 1000