BYU geologists discover 'super volcano' in Utah
Geologists at Brigham Young University have discovered what may be the world's largest "super" volcano that erupted in Utah's own backyard.
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“Geologist [I'm Climate Change]”
Since: Mar 07
#1 Dec 11, 2013
A 6000km3 volume is about the same as several of the large sillar producing supervolcanoes in the Altiplano (of which we currently see only the resurgent domes & lots of younger sillar ponded in the caldera. which lie immediately behind the arc volcanoes that came up later than the supervolcanoes & buried the arc front.
The Toba supervolcano at ~7000Km3 (and sillar producing) is still the largest erupted volume (of which about 2500Km3 formed the outflow facies outside of the caldera rim of the 100*35Km graben form caldera. The rest of the erupted volume of Toba ponded in the caldera and compressed down into densely welded rhyolite tuff(which is why we see the caldera as a caldera).
The Utah supervolcano appears to be a backarc/hotspot supervolcano with rather less gas then Toba and would have produced welded ash flow tuff otflow facies similar to Yellowstone. The hotspot is likely to be the current Colorado hotspot (responsible for Dotsero and hot sulphur springs). The backarc spreading is basin & range type which was initially driven by the Raton-Clayton hotspot. Exactly how much drift of the basin & range occurred since the eruption has not been measured (it may be a Raton-Clayton derived volcano.
This one looks like part of the Utah caldera volcano field and indicates that this dot on the map has not yet been mapped in full. It may however be rather older & be part of the range series of the basin & range subdivided by later spreading.
Would be nice to see on the geological map.
Have a nice day: Ag
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