(meteorobs) A new meteor crater in Canada?
Robert Hamlin
Robert.Hamlin at Dartmouth.EDU
Mon Mar 17 08:48:50 EDT 2008
--- "Roberto G." wrote:
That do you think of this topic?
Best greetings.
Roberto Gorelli
http://www.concordmonitor.com/apps/pbcs.dll/article?AID=/20080314/NEWS01/803140369
(from http://www.anomalist.com/)
--- end of quote ---
Bob Gilette of the New Hampshire Astronomical Society identified the structure as a well-studied volcano remnant. His post:
^^^^^^^^^^^^^^^
The circular structure in Pawtuckaway State Park is not an impact crater.
It's a ring dike -- the fossil remains of a collapsed volcanic caldera -- one
of half a dozen in New Hampshire dating to the Cretaceous period. The
classic example is the Ossipee Mountains, a circular range 9 miles in
diameter.
Geologists say these are the remnants of catastrophic collapse on the scale
of Krakatoa that initially left circular, probably water-filled lakes
resembling Crater Lake. Surrounding terrain slowly eroded, leaving a
relatively high circular rim of harder material.
So don't bother pulling your metal detectors out of the closet...
Cheers,
Bob Gillette
Ossipee
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