Robin and Sheila
2 different people not knowing each other with the same idea.

Robin drawing circles and Sheila going out on a global visual perspective but with the same conclusion that Hudson's bay remenants of an ancient giant caldera.

Got my attention too guys, but need some time so my little stupid brain can process all that information. Sheila's stuff heavy to read btw.

I find the Ice eroding/pushin theory stupid and close to heresie.

Nid

Robin I just got to say you've got me going with these circles, I'm going to do some more with maps and things soon, but at the moment my household has all gotten head colds so I won't be doing anything that requires too much thinking for a few days

I read the article, that puterman linked to, written by Sheila Lynch-Benttinen and tho I think she's on the right track, she's way off in places.
She seems to think that the other side of the hudson caldera is over in russia from when the tectonic plates were closer together, but I can't see how this is possible.
She's completely left greenland out of the equation, assuming that it has risen as a new land since the separation of the plates, but according to everything I could find on plate movements (theoretical or scientific) including the growing earth theory, greenland is actually part of the north american plate and has always been there, so it would have been smack bang in the middle of her caldera. Apart from that a lot of what she says makes sense.

Well I hope look into this some more when my head clears.

cheers

Penny

As always Robin,very well thought out and VERY interesting... Got me thinking ... more later on that. For now, flagged and

The following may be disjointed. I'm hoping to hold off a migraine, and before I take medication if there is a need, I want to write before I am unable. I couldn't write on the weekend because I was chasing around a seven year old by all by my lonesome. I barely had an hour to sit and catch my breath.

Firstly I must thank you Puterman for making your map. And thank you for making me a space to air my ideas, and save those that are still reading the Yellowstone thread from reading my longwinded ruminations. My favorite thing about your map is that you made the circles appear in the order in which the eruptions happened chronologically. The reason the circle in the southeast is virtually perfect is because it is the youngest. Trust me I sincerely appreciate your effort. And my criticism is only because I'm neurotic about these spheres. The most westerly circle is a tiny wee bit too big. The secret is that it runs through Churchill Manitoba. And it's Hudson Bay. You added and S. Don't feel bad. I refered to it as Hudsons Bay for decades. I think because we hear of The Hudon's Bay Company in history class. Yes, I liked the order in which the circles appear because it gives me sense of how it would look over time. Thank you again.

From the circles we get a direction of northwest movement. That's the diretion of the North American plate over the last 200 million years. That's why I didn't think Sheila Lynch-Benttinen's hypothesis is off the mark. She, like many others see the circles, or at least the perfect arc. She was looking for the missing pieces. There is no way parts of the event could be in Russia. The eastern edge of North America is about 200 million years away from the Mid-Atlantic Ridge when using the rate of movement of the plate. The spread is measurable and like with the rings in a tree, it can give you a time reference.

Seeing things. It would seem that lots of people have seen the perfect arc. Lots of geologists have studied it in an attempt to understand what caused the formation. Shelia Lynch-Benttinen saw the giant hole in Canada and wondered what caused it. PennyQ has done the excercise and now has circles running around in her brain. Puterman has sat up and taken notice. I saw the hole and I wanted to know how it was caused.

There have been other people who saw things on a map. Alfred Wegener saw things. He saw how the continents fit together like the pieces of a puzzle. He has been credited as the father of plate tetonics. His continental drift theory was born after he watch slabs of artic ice smashing into each other. I'll save you all the history, you can look him up and you'll notice that his ideas took a long time to take hold and he faced organized opposition. But he wasn't the only one to notice the puzzle-like appearance of the continents. "Magellan and other early explorers also noticed this on their maps." Wegener was wrong about the mechanism, but he was definately on the right track.

So what do I see? I won't ask Puterman to keep making maps. PennyQ seems eager so I will try and make her do some extra work. PennyQ, you have seen the three circles in alignment. But they are not the ony ones on the track. Manicougan Crater and the Gulf of St Lawerence have the center of their spheres in perfect alignment. You can make a perfect circle with the arc in the Gulf of St Lawernce. The center of that circle, and Manicougan make the line of circles, or craters, which are a chain of caldera.

I better stop writing. Migraine coming on. Won't edit. Hope it was coherant. Hope more people make more maps and maybe a math geek can work on that angle. Just hoping and thinking and soon my brain be aching.

Thanks all for your interest. And please infect other with the circles so that they may become obsessed and an answer found.

One last thing. Wegener came up with the idea of Pangea. As I've stated, North American has been moving northwest. The same direction as the circles in Hudson Bay. My hypothesis is that Pangea had been moving in a northwest direction over the hot spot that I believe is responsible for the caldera. During the extinction event some 200 mya, Pangea split apart. It was not long after my proposed Gulf of St Lawernce mega eruption. Not only was there a massive eruption at this time period, it was followed by the splitting of the super continent of Pangea.

Imagine a giant crack in the earth opening and then pushing the continent apart. Makes any event today seems like a hiccup.
I'm going. My head feels just like Pangea at the moment the pressure underneath reached a critical point.