[Moontanman]

Originally Posted by freeztar

According to the article listed third on this site, high levels of CO2 were found in 3.8 billion year old rock. This suggests that an atmosphere was present well before this, but how long before, I think, is still unknown.



Are you suggesting that pure concentrations of Cu, Pb, and Zn are due to biological processes?

The idea was the Earth had no significant atmosphere for the first two billion years, not true if you go by current models. Yes, it is a well documented theory that biological and geological processes were both the source of most if not all heavy metal deposits, even concentrations of gold are thought to be the result of biology working various oxides and sulfides, sulfates and organometalic hydrocarbons of metals in the crust as these chemicals welled up from within the crust. I am not talking about rarified deposits but the places where very concentrated even pure metals are found. Some think even the more rarified deposits are from such processes but only the very concentrated or pure deposits can be actually shown to be from these processes.

[bigfatpothead]

WOOHOO

I finally started a thread on a forum that didn't get me banned!


History is made

[Moontanman]

Originally Posted by bigfatpothead

WOOHOO

I finally started a thread on a forum that didn't get me banned!


History is made

I am glad, we need more BFPH's in the world, I never met one I didn't like!

[bigfatpothead]

thanks man
have ya heard my music?

http://www.bigfatpothead.com/music/inmymind.mp3

I also have stand-up videos

Originally Posted by Moontanman

I am glad, we need more BFPH's in the world, I never met one I didn't like!

[Moontanman]

Originally Posted by bigfatpothead

thanks man
have ya heard my music?

http://www.bigfatpothead.com/music/inmymind.mp3

I also have stand-up videos

No, all I have is very slow dial up but when I change to broadband I plan to check you out.

[John L]

Originally Posted by Turtle

This sounds/looks like part of the Carolina Bays formation. Here's a start for you on that with a thread here at Hypography. >> http://hypography.com/forums/earth-s...lina-bays.html

Here at Hypog we have several threads and lots of links on Earth impacts. :Earth:

http://hypography.com/forums/environ...ct-site-s.html

http://hypography.com/forums/astrono...r-planets.html

Especially good!! >> http://hypography.com/forums/environ...xtinction.html

I think you are correct here. The total number of Impactor signatures are too numerous to count accurately.

The best estimate is that these 'bays' are the result of cometary collisions with the earth's atmosphere, where the comet would desintegrate in the atmosphere and expend most of it's kenetic energy. The resulting heat and blast effect would be horrendous. Larter objects, that were rendered smaller, would continue and strike the earth, at an angle, causing small craters, which would take time to erase, or cover.

If you study this picture closely, you can't help but see that there are multiple times recorded here. Many of the original impacts are weathered and covered by time, before later strikes are registered. This can only mean that there have veen multiple strikes, in time, and we can continue to expect more in the future.

Furthermore, I have no doubt that our greatest thread it from primarily comets, and secondarily asteroids, which are really reminents of earlier comets. They are ususlly larger, come in two to three times the speed, and have much more kenetic energy(ie heat and blast effect).

If you use the Carolina Bays as an example, the blast effect would have been more than disasterous. It would have litterly destroyed anything immediately under the blast, even though they would not fall within the 'bay' depressions.

I am comfortable in believing that it was a cometary impactor that led to the mass extinctions and ending of Clovis culture in post Pleistocene times, and most likely the cause of the Younger Dryas that immediately followed.

[Jack Hughett]

Ronnie (AKA Pothead)

You wrote:
"I was browsing google earth and found that a very large object hit the US and scraped along the surface before
Exploding in alabama and showering the midwest with huge rocks that left craters all over texas and arkansas.
Most of these craters have taken the form of small ponds.

The impact point is a hundred miles or so south east of huntsville Al.
And there is a huge impact crater that goes through 3 states.
The thing was so huge that it carved out the Appalachian mountains."



I'm a newby in the forum and I too have been looking at this very same impact area, I agree with you that it is an impact site. I have thought so for many years now, and was glad to finally find someone else who also felt that it was. I have written several geologist about this possibility but have had little success convincing them. I wish you better success. But I have a slight different take on the impact. I feel that the meteor didn't approach from the northeast as you have said, but first entered the atmosphere just above Guntersville Lake, which is also where you have the center of the ring located. Like you, I feel it struck at a very sharp angle but instead of bouncing down from the northeast it began digging a trench to the northeast. This trench is known as Sequatchie Valley and it cuts through the center of Tennessee. I feel the meteorite would have been roughly a little over three miles in diameter when it entered the atmosphere but after initial loss of mass of entering the atmosphere it was reduced to a three mile width which is the width of Sequatchie Valley.
At the upper end of Sequatchie Valley is an enclosed little valley and it is known as Grassy Cove. It is in this location that I feel the meteor completely penetrated the earth's surface.

After this point it gets a little confusing. I don't know if the meteorite split apart or as it's forward momentum slowed, it, instead of slicing the rock apart, pushed a massive block of rock ahead in it's path. In either scenario it was responsible for the creation of the Cumberland Mountains and Plateau. I feel a major portion of the meteorite stopped at a location under a formation of mountains located on the top of the plateau. The location is in the northern part of Tennessee where the counties of Scott, Anderson, Morgan, and Campbell intersect.

The meteorite should be located under Hembree, Tennessee located in Scott County. I'm almost certain it would be made of Iron, for iron can be found from Birmingham, Alabama to these mountains in northern TN. Crab Orchard stone found on the plateau even has a large concentration of iron within it.

After the meteorite reached Hembree this is where the confusion takes place. The meteor either splits here or as I said before, a massive block of rock was pushed in it's path. This has caused the Cumberland Escarpment to be offset from this point on. but it also leaves signs of something I feel is similar to a boat wake. It was actually formed in the same manor, but instead of being shaped in water it was formed in rock. If you skim a rock across a lake at a sharp angle it leaves a wake behind it. If you throw a rock strait into the water it causes a circular wake. This is the same principle we find here. but just as the rim of an impact crater is circular when striking perpendicular, this rim was elongated because the meteor was traveling parallel to the earth but just under the surface.

If you are interested in viewing what I am trying to explain, I wrote out some instructions for locating it and the location of it's path to use on Google Earth.

First line the viewing field of Google earth to 34°24' N (+,_) and 86°16' W (+,-). Set the Eye Altitude to 75 miles (+,-). Turn the compass heading to where the N arrow faces north-northwest. This should now be centered over Guntersville Lake in Alabama. This is also the very center of your Impact crater. Now tilt the viewing area back to where the Eye Altitude reads 43 miles. You should now see a tan colored valley cut through a green area. The green area is the Cumberland Mountains and the tan colored valley is Sequatchie Valley.

The Appalachians were already in existence when this event occurred, but the lower portion was blasted away by the first initial impact. Also when the Meteorite entered into the atmosphere it sent debris falling in all directions and more than likely responsible for many of the smaller impact sites that you have located in Texas and other areas.

Grassy cove is located at 35°50'N and 84°55W
Hembree is located at 36°13'N and 84°25'W It is hard to pick out the circular range of mountains in this location. The different colors used by Google in this area distort the view, but I promise you, it is there.
Very upper end of the impact zone 37°04'N and 82°20'W. Although this would be the end where another portion of the meteor might be located. There was also a blast zone which affected the surface as far away as Pennsylvania.

I hope that you are able to make sense of what I have written.

Regards,
Jack

[modest]

Originally Posted by Jack Hughett

If you are interested in viewing what I am trying to explain, I wrote out some instructions for locating it and the location of it's path to use on Google Earth.

First line the viewing field of Google earth to 34°24' N (+,_) and 86°16' W (+,-). Set the Eye Altitude to 75 miles (+,-).

Welcom to Hypography Jack.

I've attached a google earth placemark below for anyone wanting to see the location you describe.

As I discussed in post #51, the geology of the Sequatchie valley area is well investigated and well known. It is not the result of a meteor but erosion. This site explains:

Geography of the Sequatchie Valley

There are good references at the bottom of the page. Also, I've shrunk this image depicting the formation:



I should note that there is a nuclear power plant in this valley. Before the plant could be built an extensive geological investigation was done. The report is available online:

Geotechnical Geological and Seismological GG S Evaluations for the Bellefonte Site North Alabama

It is inconceivable that this investigation could have missed the signs of a meteor impact and completely misunderstood the formation mechanism of this valley.

It is, however, interesting that two different people saw this:



and thought of a giant glancing meteor.

~modest

[Jack Hughett]

Modest,
Thanks for the reply, but I have been aware of the geologic explanation for Sequatchie valley from the conception of this theory many years ago. I tend to question this explanation. It seems that if it were formed from erosion only, the lower end of the valley would be considerably wider than the upper end because this is where the erosion first took place. It is not! The valley maintains a fairly consistent 4 mile width from rim to rim for it's entire 60 mile length. As far as Ronnie and I coming to similar conclusions from the image shown that this was a meteor impact. A portion of the image was left out of the picture. The image really needed to be panned back a few miles to get the whole jest of the impact. I'll try to upload an image that shows the 250 mile impact ring that is centered at Guntersville lake.

I tried to post an image of this but with me being new to the forum I am currently not allowed. The best I can do is give you the coordinates to view it on Google earth.

Go to 34°20'N and 86°20'W and pan in to 560 miles in the Eye Altitude. Again rotate the
compass to where the N arrow is facing North-northwest. Then tilt the view to where the Eye Altitude reads 435 miles. This is what we both saw.

I understand your disbelief in this theory and I know there is not much chance in winning a fight against known and respected geologists and scientists. But I know what I know and see what I see and until they are able to convince me otherwise I staying pretty firm on my belief that this is indeed the site of an impact.

You said:
"It is inconceivable that this investigation could have missed the signs of a meteor impact and completely misunderstood the formation mechanism of this valley."

You have to take into account that the study of meteor impacts is really in it's infancy. When Seqautchie Valley was studied by, I'm sorry but the name of the geologist escapes me now, but when he studied the valley by walking it from end to end not many scientists and geologist even believed that the earth was even hit by large stones from space.

Try to envision this scenario to help put this into perspective. Imagine an Iron meteorite, three miles in diameter, traveling at upwards of 100, 000 mph entering our atmosphere at an angle that almost causes it to bounce off but not quite. When this meteor strikes the earth it doesn't suddenly come to a stop as many think all meteorites do. But this one being made of iron has the momentum and density to bust any object in it's path. Rock would seem to have no more constancy than sand in it's path. Traveling at such speed, many seconds would pass or possibly minutes before it would come to a complete stop. During that time, it would have covered many miles. As it slowed the earth beneath it could no longer support the weight and so the meteor would begin to penetrate below the surface. This is what I think happened, crazy as it may seem to you, it doesn't seem out of the rim of possibilities to me.

Thank's again for the reply.

[modest]

Originally Posted by Jack Hughett

I tried to post an image of this but with me being new to the forum I am currently not allowed. The best I can do is give you the coordinates to view it on Google earth.

Go to 34°20'N and 86°20'W and pan in to 560 miles in the Eye Altitude. Again rotate the
compass to where the N arrow is facing North-northwest. Then tilt the view to where the Eye Altitude reads 435 miles. This is what we both saw.

Thank you for the reply Jack. The restrictions on posting links, images, and attachments are necessary to prevent spam. I have followed your google earth instructions and capped this image:



I've also attached a GE placemark with the new view. I assume you're talking about the semicircle of deforested area that I've marked with a red overlay:



To give people an idea of scale, the red circle there measures 450 kilometers in diameter. I just measured the rim of the yucatan crater in GE at 160 kilometers.

~modest