Dear Old Farmer,
The Hudson Bay region is not a sinkhole. Most sinkholes are located in areas with limestone and other soft rock. Hudson Bay is located in the Canadian
Shield. Some of the oldest and hardest rock in the world.
So you must be talking about the fact that it is believed that the area was depressed by the weight of glaciers. This is one possible answer for the
Lowlands on the western side of the bay. But the Eastern shores are sheer verticle features and the terrain is very hilly. The reason for the glacial
depression hypothesis was to explain the magnetic anomoly. There is less gravity in the Hudson Bay area. But now scientist think, (and I mean think,
because, you are wrong, not everyone knows it is a sinkhole, but we agree it wasn't an impact) that the magnetic anomoly is are a result of
convection within the mantle. The answer may be a combination. The land could have been depressed by glaciers and this could have had an effect on the
circulation of magma under the deformed crust.
But nothing has been proven. Except that the near perfect circle in Eastern Hudson Bay, the Nastapoka Arc, is not from an impact. The geological
survey convinced me because the area did not rebound like other impact sites. So the only explaination for the arc is from glaciation. This
explaination seems more fantastic than my own. I don't buy it.
You are correct to ask for some hard evidence for an eruption. There should be some rock solid proof for an eruption as I suggest. Oh god how I wish
it was there. It would prove my hypothesis. After all, the reason geologists know that the last eruption at Yellowstone was 72 000 because they find
the of the lava flow. (if you take the average interval of eruptions at Yellowstone, it's one every 8000 years, this means Yellowstone could be 60
000 years overdue)
So I should be able to show you a layer of volcanic activity to correspond with the time of that eruption in the strada. But my eruption is a slow
flow. There is no big puddle of lava to find. A mega eruption is an ejection of material. Just like a solar ejection, the material is thrown from the
volcano. There would be virtually nothing left. It would be like putting a nuclear bomb in a building. After the detonation you will find nothing but
a crater. The material would be incinerated and thrown great distances.
But wouldn't there be some trace? Not neccessarily. The magma would be injected into the atmosphere and fall back to earth over a long period and
because there was almost constant volcanic activity at the time, the residue could be there, but not differentiate from other sources. And after the
eruption, there would be a corresponding ice age. The glaciers, as the moved across the continent, scrapped and eroded the surface. The falling ash
would lay within the glacier and then flow out as it melted. The land has been scrubbed clean by glaciatation.
How else do you get a large hole in the Canadian Shield? There is a reason that the glaciers in North America formed around Hudson Bay. It's
because the body of water was already there and this is where the first ice would form. My calculations have the eruptions dating from 448-365 million
years ago. There is an anciet shorline running through Churchill Manitoba dating back 400 mya. If glaciation caused the Nastapoka Arc and depressed
the crust, why didn't glaciation have similiar effects in Asia. Asia was covered by the same ice age and yet North America and Asia are greatly
different. Canada has 70% of the world's fresh water. Russia does not have thousands of lakes. Something was different in North America. And that
difference was a giant hole in the middle of the hardest and oldest rock in the world. How does ice carve such a dramatic landscape in one place and
yet not have the same effect in another? Some is due to topography. But the difference should be minimal.
North America had a massive magma chamber under it. Combined with water, volcanic activity blew craters in the ancient rock. Yellowstone is not
unique. And is small when compared to it's older versions. Early in earth's formation, Mega eruption ejected material into orbit. That material
colaleased and became our moon. At least that's what I think.
www.newscientist.com...
www.cbc.ca...
Hudson Bay was not formed by a larger version of this,
www.liveleak.com...
[edit on 25-11-2009 by Robin Marks]