Tuesday, November 15, 2011

Supervolcano: How great is the yellow stone caldera explosion?

The Yellow Caldera is the volcanic caldera found in Yellowstone National Park in the country of United States which sometimes refers as Yellowstone Supervolcano. The caldera is on the northwest Wyoming with vast majority of park it contained in major features of Caldera measuring 55 kilometers by 72 kilometers.


Yellowstone found over the hot spot where hot molten magma in the mantle rises on the surface. Now, Yellowstone hotspot is under Yellowstone Plateau. The hotspot apparent motion led to the east to northeast direction and the North American Plate is in actual moving on the west to southwest stationary Earth’s mantle hotspot. This Yellowstone hotspot before helped the Snake River Plain eastern part in the series of great volcanic eruptions. In the past 17 million years, the hotspot generated succession of dangerous eruptions as well as less dangerous basaltic lava floods. Both eruptions helped created the eastern part of Snake River Plain with dozen of such eruptions happened the super eruptions that ruined the places affected. The oldest caldera remnant identified close to the border of McDermitt Nevada-Oregon withvolcanistic piles as well as arcuate faults defining caldera complexes in 37 mi in Carmacks Group diameter of southwest to central of Yukon, Canada that shown as the source of Yellowstone hotspot formation. There is a progressive new remnant of caldera overlap the volcanic fields extending on Nevada to Oregon border through the Snake River Plain whichterminate only in Yellowstone Plateau.

Yellowsyone caldera is widely known as the largest system of volcanoes. This is also famously called as supervolcanodue its caldera which is can make large forms of explosion proven in the past. The present caldera originated from the cataclysmic eruption which happened 640, 000 years in the past with 240 mi3 or 1, 000 km3 composed of rocks, ashes and other pyroclastic materials. The eruption it produced and is capable of more than 1, 000 larger than the eruption and damage of Mount St. Helens way back on 1980. Closely two-thirds of a mile deep with 28 miles by 52 miles in the place which the deposited Lava creek Tuff that the formation of welded tuff. This supervolcano spread its deadliest explosion 2.1 million years in the past that ruined 588 miles3 or 2450 km3 with its volcanic material creating formations of rock which are Tuff of Huckleberry Ridge Tuff resulted to the creation of Island Park Caldera. This world super volcano found in United States made its small eruption 1.2 million years previously that led to the formation of Henry’s Fork Caldera while it deposited the Tuff of Mesa Falls with the range of eruption 280 km³.

This greatest world supervolcano can spew lava farthest into the sky that its ashes can kill the plants dumping a 10 feet layer which can reach to 1, 000 miles distance. Once it will make its gigantic eruption again, two-thirds of the US place will tumble-down, no longer available for men and other living things in habitat. This is a big nightmare that many geologist and scientists predict once it erupts after 600, 000 years or in the years to come. It erupted millions of years in the past and it is also expected to erupt with the same or exceeding great power of eruption according to researchers who monitors the volcanic activity of this super volcano. The scientists reported that starting from 2004-2008, underneath of this giant volcanosituated in northwestern Wyoming rose with an average of 3 inch per year. The movement rate is more than three times bigger than its usual record since 1923. However, in 2008 the rate of movement slowed down significantly and US Geological Survey pronounced that there are no signs that it will make a great devastating eruption at Yellowstone. The recurrence intervals that shows predictable and regular movement as well as lack of data is keeping the geologists an idea with no accurate date for the eruption of such supervolcano without any good warning too for the US people thus it poses fear to everyone living there.

If the eruption will happen, it can then dwarf the efficacy of Eyjafjallajökull volcano of the Iceland that erupted last April making a chaos travel all over the world. The geophysics professor in the University of Utah who is Robert B. Smith said that such supervolcano has the biggest best evidence of crustal magma chamber is filling with molten rock yet there is no concrete basis for an idea to know the length of this process before it is good to tell if there is an eruption or inflow of molten rock, then the caldera will deflates again. This supervolcano in US also famously called as “cooking pot” atop the largest volcanic field of North America. The latest blast from Caldera is approximately 640, 000 years ago and the most recent small eruption while small eruption transpired 70, 000 years previously. The estimated area of ashfall from Yellowstone Caldera’s largest eruption proved that there is a shallow magma in the shallower depths. Dan Dzurisin, Yellowstone expert Geologist in US Geological Survey located in Cascades Volcano Observation said that “clearly some deep source of magma Yellowstone and since the Yellowstone erupted in the recent geological past; we know that there is magma at shallower depths too.”
There is an observational monitoring in the Washington State as there are evidences that in the crust there is an arising of magma on such place recorded each time duration and there is large amount of heat coming from the Yellowstone right now which results to so much heat coming out that if it wasn’t being reheated by magma, the entire system might have turn into a stone cold since the its last eruption which was 70 thousand years ago. There is actually a big controversial on the source of the Yellowstone hotspot especially that some geoscientists theorize that the Yellowstone hotspot is the effect of interaction in the place conditions of lithosphere and convection of upper mantle while others tell it is the deep mantle origin. It becomes part of the controversy as this hotspot came with sudden appearance based on geologic record. Moreover, flows of Columbia Basalt appeared at the very same time with the hotspot.

Much to the fear of many people in US and around the globe is the anticipated eruption of this Yellow Caldera being thesupervolcano which for sure will make a great impact globally.

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