How does your volcano theory explain the shatter cones?
Ever seen 12616 cubic miles of volcano explode and leave 9000 cubic miles of tuff behind? That is what happened to Sudbury. No other way to explain all that tuff in the basin. Look at Mt. St. Helens. Tuff junior and some fell on Seattle, 40 miles away. It lightly sprinkled the state, and there were large 50 foot deep ash flows 15 miles away. Sudbury had tuffs 3 miles deep spread 80 by 40 miles and that is what is left. South of the rim the outpouring of felsic magma is the largest in the world. Read the lit.
You want to be upwind a few feet. Like about 8 million. These explosions probably put ash around the world in a cloud for 1000 years. The volcano in Kansas that exploded covered the entire state in ash 50 feet deep. That is no exaggeration. It is geological fact. Sudbury was bigger. It probably would have killed animals 1000 miles away. There were probably none to kill however, the earth had just got an atmosphere of oxygen and the crust was still the temperature of tepid tea. Micro flora roamed the sea. Were tube worms living near volcanic vents? They may be the oldest living fossils.
Volcanic explosions are the largest energy releases man will ever experience, perhaps 100,000 times more powerful than a super H.
Krakatoa was heard 8000 miles away. It sank an entire Island.
And it was a baby compared to Sudbury. The energy require to vaporize 12,000 cubic miles of rock is not small. 2 billion, billion lbs of rock. Make 15% of it into micro dust and launch it around the world by hurling it 60 miles into the air where 300 MPH winds will spread it around the planet. Take 75% of it and spread it in a layer 750,000 miles square and 50 feet thick. After hammering it into dust. Now that would take about 40 lbs of nitro per ton conservatively. That would be 3 million mega tons of explosive. But the blast was much more powerful than that as it pulverised the rock completely and made it attain hypersonic speeds. The rimrock is crushed 150 feet deep. It can be precisely calculated the force require to do that. The largest man made explosions will open up craters a 1000 feet across and the crush area is a few feet. 25 million tons of explosive does that. Now imagine what it would take to open a circle 50 miles radius three miles deep. Yep, we have ignition, Houston. Can a volcano do it? Want to stand next to a Pinatubo, a Vesuvius, or a Mt. St. Helens? The geological record tells us these guys were amateurs. Krakatoa was getting there, but it was just a warm up. Some geological record volcanoes changed the climate of the earth for millenia in one blast.
It may require perhaps 10 to 100 times that force calculated to blast rock fine, as in the 40 lns of nitro per ton calc, to do such a basinal blast. 30 million to 300 million megatons. Kimberlite explosions reach the speed of sound and throw tuff rock 15 miles in the air. They can be several generations. The monolithic Onaping tuff tells on ominous dreadful story. It was all laid down at once, and lots and lots of it. One helluva big bang. Filled an immense area, 1200 times larger than the largest kimberlite tuff. And we know that was 10% of the total mass that went up. The fall back always is.
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