From Wikipedia:
http://en.wikipedia.org/wiki/Holocene_extinction_event
http://en.wikipedia.org/wiki/Younger_Dryas
http://en.wikipedia.org/wiki/Clovis_culture
http://en.wikipedia.org/wiki/Tunguska_event
I believe I've found the site of the Holocene impact event some have described. It's been right under our feet all along. But the stupendous size of the thing is almost beyond comprehension. And that is why we never realized what we were standing on. And until we saw Shoemaker-Levy 9 hit Jupiter, it would have been incomprehensible that such a thing could possibly happen at all.
The story of the search is a lot like the ancient story of the blind men and the elephant. The blind man who feels a leg says the elephant is like a pillar; the one who feels the tail says the elephant is like a rope; the one who feels the trunk says the elephant is like a tree branch; the one who feels the ear says the elephant is like a hand fan; the one who feels the belly says the elephant is like a wall; and the one who feels the tusk says the elephant is like a solid pipe
And then someone explained to them:
All of you are right. The reason every one of you is telling it differently is because each one of you touched the different part of the elephant. So, actually the elephant has all the features you mentioned
You see, all of this time we've all been like the fleas on an elephants back, who, when asked what they were standing on, replied; "Why, this is our world of course!" We just needed to get a little distance. Simply turn on Google Earth set it to the highest resolution you can get, open your eyes, then zoom out to about 1300 miles, and then look closely at the eastern USA. If you know some one who has military experience with aerial surveillance photos have them look with you.
The two circles you see centered on north central Alabama are not mere artifacts of the software. I believe they were caused by the compression waves of multiple explosions of unimaginable magnitude. And that they are the ghostly signature of the beginning of the Holocene extinction. As well as a lot of other really bad stuff. It was a bad day on this side of the world.
Studies of the geology in that region indicate that it isn't consistent with the geology of a crater. But careful analysis of sedimentary deposits all over the region will give results that are consistent with a large exploding comet. The explosion didn't cause a crater in the normal sense. But it could be confused as one if you don't look close enough.
You see, those circles are more than 250 miles in diameter. And that's why most folks will glance at it and say "Nah, no way, that's impossible". And they'd all be right if the circles were rim of a crater. An impact powerful enough to make a crater that big would kill everything on the earth but insects and germs. But the circles are a compression wave structure, and not the rim of a crater at all.
The Holocene comet fragments exploded in the air like the Tunguska event. But it was an explosion so much powerful that it broke the very bedrock and left a giant compression wave frozen in the earths crust like ripples in a pond. And at the center you'll find a fracture star like a stone fracture in a windshield. But this one is a 12 miles long and 6 miles wide. And the town of Marshal Alabama is at the center of it. There were other fragments too, and if you look closely you can see their footprints in the perfect circular depressions 30 or 40 miles wide around and near Marshal. The other major explosion left a circular depression 65 miles wide centered on eastern Tennessee with some type of splash feature extending over 400 miles to the northeast.
Doing good science demands that every conclusion should be submitted for peer review. And I believe that's way it should be. I am a common man. My peers are common folk so my submittal consists of these five words for the rest of my human family:
Would you look at that?!!
See what I mean? If I'm wrong, oh well. If correct, wow!