Geo History: Yellowstone Supervolcano, To Plume or not to Plume?


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By Alex Wierbinski - Posted on 18 December 2017

 

 

Geo History

Yellowstone Supervolcano

To Plume or not to Plume?

Heat from below Pacific Ocean fuels Yellowstone, study finds,
University of Illinois at Urbana-Champaign, December 18, 2017.

" a revised tectonic scenario," emerges.

Conventional theory ascribed Yellowstone Supervulcanism to a plume of hot, molten material coming upward from deep in our planet's interior through a "hotspot" in the mantle located below the Yellowstone Caldera. Another example of a hotspot is the Hawaiian Islands. This research above eliminates the plume and hotspot as the mechanism feeding heat into the Yellowstone Supervolcano.

"...little support for the traditional mantle plume hypothesis."

This research cites the subduction process working a section of thin mantle off the West Coast of the Pac NW as the source of heat for the Yellowstone Supervolcano. The research indicated the subduction of this thin section of mantle provides Yellowstone's heat.

"This directly challenges the traditional view that most of the heat came from the plume below Yellowstone."

 

Update

Yellowstone Hotspot Confirmed

 

 

Yellowstone News & Observatory

 

 

Other Supervolcano News

Our Local Ancient Supervolcano
Long Valley on the East Flank

 

Campi Flegrei

 

 

 

New Horizons
Read through the science & biological news here on the Tahoe to Whitney High Sierra Backpacker; Everything we observe in each aspect of life & the physical reality around us shows us how much of it we don't yet know and haven't yet seen.

Cascadia Subduction Zone



The Active Zone
What we do know is that the subduction process has stopped along the plate boundary parallel to the High Sierra, that the plates South of the Medocino Fracture (off the coast near Humbolt Bay),  are now sliding in different directions, North & South, along the fault line, rather than the more violent subduction process. The plates North of the Mendo Fracture, including the Juan de Fuca plate, have not stopped subducting under the N American Plate along the whole NW corner of the USA.

This vast active zone runs up the coastline from near Humbolt Bay in Northernmost California all the way up to Canada, including the whole extent of the coastlines of Oregon and Washington, up to Vancover Island on the Southwestern-most corner of Canada.

An earthquake along the full length of that subduction zone would be one huge earthquake, stretching from Humboldt Bay to Vancover Island...

 

 And,major quakes along this massive faultline are a regular geological event that's right now at optimal timing since the last, indicating the mechanism is likely wound-up and ready to go...

Cascadia Subduction Zone Ready to Let Go

What Would That be Like?
If the Whole Subduction Zone Uncorks?

The Giant, Underestimated Earthquake Threat to North America,
Discover, March 3, 2012.

 

 

High Sierra Trail Guide's Geological Information & Links

 

 

Geology News

 

 

 

December 2017 High Sierra General News

 

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