[Rockhounds] Yellowstone Caldera Spawned Twin Super-eruptions Circa 640, 000 BP

[Paul]

Yellowstone spawned twin super-eruptions that altered global
climate, Geological Society of America, October 26, 2017
<https://www.sciencedaily.com/releases/2017/10/171026085804.htm>
<http://www.geosociety.org/GSA/News/Releases/GSA/News/pr/2017/17-60.aspx>

Santa Barbara Basin Sediment Record of Volcanic Winters
Triggered by Two Yellowstone Supervolcano Eruptions at 639 ka
<https://gsa.confex.com/gsa/2017AM/webprogram/Paper306169.html>

Scientists seek clues to what triggered past Yellowstone 'supervolcano'
eruptions by Matthew Diebel, USA TODAY, Oct. 12, 2017
<https://www.usatoday.com/story/news/nation/2017/10/12/yellowstone-supervolcano-research-finds-what-triggered-eruption/757337001/>

Yours,

Paul H.