posted on Dec, 25 2012 @ 04:59 PM
Originally posted by iamhobo
reply to post by TrueAmerican
It is large, yes...but it doesn't contain the explosiveness of most super volcanoes. It would create lava floods, but wouldn't cause a fraction of
the damage Yellowstone could produce.
No you are correct, it would not cause a fraction of the damage. It would cause multiple times the damage. I think you under estimate the damage from
lava flows. You are thinking "just a stream of lava" yes?
The little tiddler of a lava flow in Iceland - Laki - did for 2 million people in Europe.
The system erupted over an eight-month period between 1783 and 1784 from the Laki fissure and the adjoining Grímsvötn volcano, pouring out an
estimated 14 km3 (3.4 cu mi) of basalt lava and clouds of poisonous hydrofluoric acid and sulfur dioxide compounds that killed over 50% of Iceland's
livestock population, leading to a famine that killed approximately 25% of the island's human population.
The Laki eruption and its aftermath caused a drop in global temperatures, as sulfur dioxide was spewed into the Northern Hemisphere. This caused crop
failures in Europe and may have caused droughts in India. The eruption has been estimated to have killed over six million people globally, making
the eruption the deadliest in historical times.
Now compare that very damaging lava flow to this
The Deccan Traps formed between 60 and 68 million years ago, at the end of the Cretaceous period. The bulk of the volcanic eruption occurred at
the Western Ghats (near Mumbai) some 65 million years ago. This series of eruptions may have lasted less than 30,000 years in total.
The original area covered by the lava flows is estimated to have been as large as 1.5 million km², approximately half the size of modern India. The
Deccan Traps region was reduced to its current size by erosion and plate tectonics; the present area of directly observable lava flows is around
512,000 km2 (197,684 sq mi).
I don't think we can really visualise such an outflow, the complete atmospheric trauma, and the virtual ELE of such an event.
It would create so much damage that you would be praying for a small eruption like Yellowstone - that is if anyone survived.
Here is another little lava flow for you
The Siberian Traps
Vast volumes of basaltic lava paved over a large expanse of primeval Siberia in a flood basalt event. Today the area covered is about 2 million
km2—roughly equal to western Europe in land area—and estimates of the original coverage are as high as 7 million km2. The original volume of lava
is estimated to range from 1 million to 4 million km3.
And how about this one - the father of Yellowstone, or is it the son of Yellowstone?
Some time during a 10–15 million year period, lava flow after lava flow poured out, eventually reaching a thickness of more than 1.8 km (6,000
feet). As the molten rock came to the surface, the Earth's crust gradually sank into the space left by the rising lava.
In the middle Miocene, 17 to 15 Ma, the Columbia Plateau and the Oregon Basins and Range of the Pacific Northwest were flooded with lava flows.
Both flows are similar in both composition and age, and have been attributed to a common source, the Yellowstone hotspot. The ultimate cause of the
volcanism is still up for debate, but the most widely accepted idea is that the mantle plume or upwelling (similar to that associated with present day
Hawaii) initiated the widespread and voluminous basaltic volcanism about 17 million years ago. As hot mantle plume materials rise and reach lower
pressures, the hot materials melt and interact with the materials in the upper mantle, creating magma. Once that magma breaches the surface, it flows
as lava and then solidifies into basalt
I just love LIPs (Large Igneous Provinces)
edit on 25/12/2012 by PuterMan because: (no reason given)