The Volcano in Washington with 1,500 Foot High Lava Flows; Spiral Butte

In Washington State is a spiral shaped lava flow which in sections is more than 1,500 feet in height. Known as Spiral Butte, this thick dacite lava flow likely represents the youngest eruptive products of a potentially dormant volcano. Spiral Butte is located southeast of Mount Rainier and does not represent an isolated vent.

Thumbnail Photo Credit: Google Earth, Image U.S. Geological Survey. Image was then overlaid with text, the GeologyHub logo, & an orange border overlay.

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Source of Volcanic Explosivity Index (VEI) methodology and criteria: Newhall, C. G., and Self, S. (1982), The volcanic explosivity index (VEI) an estimate of explosive magnitude for historical volcanism, J. Geophys. Res., 87(C2), 1231–1238, doi:10.1029/JC087iC02p01231. Accessed / Read by Youtube.com/GeologyHub on Oct 5th, 2022.

Google Earth imagery used in this video: ©Google & Data Providers

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Sources/Citations:
[1] U.S. Geological Survey
[2] Michael A. Korosec, Open File Report 84-2, January 1984, Summary of Geothermal Exploration Activity In the State of Washington from 1978 to 1983, Prepared under U.S. Department of Energy Contract No. DE-AC07-79ET27014 for Assessment of Geothermal Resources in Washington
[3] Benjamin W. Stanton and Joe D. Dragovich, Washington Department of Natural Resouces, Division of Geology and Earth Resources, Mapping of Major Latest Pleistocene to Holocene Eruptive Episodes From the Glacier Peak Volcano, Washington—A Record of Laharic Inundation of the Puget Lowlands From Darrington to Puget Sound
[4] VEIs for volcanic eruptions rated VEI 0, 1, 2, & 3 are based on the estimates of YouTube.com/GeologyHub. Dates from volcanic eruptions (and their VEIs) which were assigned a VEI 4 or larger are sourced from the LaMEVE database (British Geological Survey © UKRI)

0:00 Volcanoes in Washington
0:58 Age Estimate
2:13 Spiral Butte Eruption
3:21 Eruption Size
3:45 Conclusion

Видео The Volcano in Washington with 1,500 Foot High Lava Flows; Spiral Butte канала GeologyHub