Archaeologica.org

E.P.
On a somewhat related note….

Is there any evidence of Lake Okeechobee being an impact site?

That perfect circle outline sure looks suspicious.
But I don’t know of any outer ridge evidence.

kbs2244 wrote:E.P.
On a somewhat related note….

Is there any evidence of Lake Okeechobee being an impact site?

That perfect circle outline sure looks suspicious.
But I don’t know of any outer ridge evidence.

Well, the Bahamas and the Keys could be ejector vestiges, couldn't they?

Aren't the keys made of ancient sea coral and sand in a loose concretion?

Johnny wrote:Aren't the keys made of ancient sea coral and sand in a loose concretion?

Sure, ejector material that, in the aeons since, was covered by and overgrown with corals, and that collected, and collects to this day, sand from the currents and tides. All post impact of course. The ejector material provided the foothold for (underwater) flora and fauna, and changed the local dynamics. Just like they sink old shipwrecks nowadays to provide a foothold for the underwater flora and fauna and so create artificial reefs.

Nearly ignoring the fact that all this talk of ejector material is challenging my maturity, the Marquesas, just west of Key West, were actually formed just that way. At least according to my 5th google result here:

http://www.sun-sentinel.com/travel/sfl- ... 5776.story

If anything, the keys east of Marquesas look, to me, like ejector vestige islands from that impact rather than something so far north as Okeechobee.

Johnny wrote:Nearly ignoring the fact that all this talk of ejector material is challenging my maturity, the Marquesas, just west of Key West, were actually formed just that way. At least according to my 5th google result here:

http://www.sun-sentinel.com/travel/sfl- ... 5776.story

If anything, the keys east of Marquesas look, to me, like ejector vestige islands from that impact rather than something so far north as Okeechobee.

Depends on the size, speed, and angle of the Okeechobee impactor, doesn't it?

Rokcet Scientist wrote:

Johnny wrote:Aren't the keys made of ancient sea coral and sand in a loose concretion?

Sure, ejector material that, in the aeons since, was covered by and overgrown with corals, and that collected, and collects to this day, sand from the currents and tides. All post impact of course. The ejector material provided the foothold for (underwater) flora and fauna, and changed the local dynamics. Just like they sink old shipwrecks nowadays to provide a foothold for the underwater flora and fauna and so create artificial reefs.

How do you sink a shipwreck?

circumspice wrote:

Rokcet Scientist wrote:

Johnny wrote:Aren't the keys made of ancient sea coral and sand in a loose concretion?

Sure, ejector material that, in the aeons since, was covered by and overgrown with corals, and that collected, and collects to this day, sand from the currents and tides. All post impact of course. The ejector material provided the foothold for (underwater) flora and fauna, and changed the local dynamics. Just like they sink old shipwrecks nowadays to provide a foothold for the underwater flora and fauna and so create artificial reefs.

How do you sink a shipwreck?

Try punching holes in it...!

A ship isn't only a wreck when it's lying on the seafloor, circumspice. Any construction is a wreck when it is totally dilapidated and cannot serve its original purpose anymore.

If you had a car collision at 60mph, your car would be a wreck. And you probably too. Yet neither is lying on the bottom of the sea...

Johnny wrote:Nearly ignoring the fact that all this talk of ejector material is challenging my maturity, the Marquesas, just west of Key West, were actually formed just that way. At least according to my 5th google result here:

http://www.sun-sentinel.com/travel/sfl- ... 5776.story

If anything, the keys east of Marquesas look, to me, like ejector vestige islands from that impact rather than something so far north as Okeechobee.

Thanks Johnny - I did not know that. I wonder when that asteroid or comet fragment hit?

For all of you searching, its not "ejector material" but rather "impact ejecta".

E.P. Grondine
Man and Impact in the Americas

Thanks Johnny - I did not know that. I wonder when that asteroid or comet fragment hit?

For all of you searching, its not "ejector material" but rather "impact ejecta".

No problem, though I wouldn't take it as a truth but as a possibility to investigate more closely. Subsequent and more focused searches really only turned up sources like travel guides.

I knew ejecta sounded correct. I've seen every episode of Meteorite Men on the science channel.

E.P. Grondine wrote:For all of you searching, its not "ejector material" but rather "impact ejecta".

True, that is the 'official' applicable moniker. In faux Latin. Constructed Latin. Probably constructed no longer than a couple decades ago.
I think there were about as many Roman scientists researching impact events as there were developing nuclear fusion...

Johnny wrote:

Thanks Johnny - I did not know that. I wonder when that asteroid or comet fragment hit?

For all of you searching, its not "ejector material" but rather "impact ejecta".

No problem, though I wouldn't take it as a truth but as a possibility to investigate more closely. Subsequent and more focused searches really only turned up sources like travel guides.

I knew ejecta sounded correct. I've seen every episode of Meteorite Men on the science channel.

Steve and Geoff will be delighted to hear that you're enjoying their show. I've shared a few jokes with them from the very start of that project; if you google "Grondine" "Notkin" and "meteorite" it may take you to the meteorite list archive and provide a few chuckles.

BTW, prices on meteorites from NWA (the Sahara desert) are about as low as they are going to get, and now is an excellent time to buy a few slices of rocks from space if you have any desire to. The ones on their show are usually "name" brands with way higher prices.

Possibly the Holocene Impact working group is working on that crater, or it may be accessible through the Canadian crater database. But I'm not sure about that, as this is the first I've heard of it formally.

Rokcet Scientist wrote:

E.P. Grondine wrote:For all of you searching, its not "ejector material" but rather "impact ejecta".

True, that is the 'official' applicable moniker. In faux Latin. Constructed Latin. Probably constructed no longer than a couple decades ago.
I think there were about as many Roman scientists researching impact events as there were developing nuclear fusion...

I think they came up with the word "ejecta" in the study of volcanoes first, and it was adapted from there. But then my high school latin left me with my stroke - perhaps the root was "iacta"

E.P. Grondine wrote:

Rokcet Scientist wrote:perhaps the root was "iacta"

Very well possible.

E.P. Grondine wrote: Steve and Geoff will be delighted to hear that you're enjoying their show. I've shared a few jokes with them from the very start of that project; if you google "Grondine" "Notkin" and "meteorite" it may take you to the meteorite list archive and provide a few chuckles.

BTW, prices on meteorites from NWA (the Sahara desert) are about as low as they are going to get, and now is an excellent time to buy a few slices of rocks from space if you have any desire to. The ones on their show are usually "name" brands with way higher prices.

Possibly the Holocene Impact working group is working on that crater, or it may be accessible through the Canadian crater database. But I'm not sure about that, as this is the first I've heard of it formally.

All I really found with that google search was a hilarious/disturbing thread concerning Steve Arnold, high powered drugs, a shifty male nurse, a nefarious lawyer and their alleged collusion to fleece a dying woman of her asteroid collection. I'm not sure if it was serious or the nerdiest way of saying that someone would cheat a dying grandmother I've ever seen in print. It reads like something Hunter Thompson might have imagined.

I don't think I'm the type to buy rocks. I do love collecting, though. Got a shoebox half full of petrified wood, crinoids, corals, arrowheads and supposed meteorites I found along highways, dirt roads and in fields we plowed as a kid in north Texas and western Arkansas.