[meteorite-list] Possible Ancient Impact Crater USA

From: Mike Jensen <meteoriteplaya_at_meteoritecentral.com>
Date: Mon, 17 Mar 2008 09:32:06 -0600
Message-ID: <6f9da8300803170832r4d21c363ge5a2f9f90821c310_at_mail.gmail.com>

Hi Pete

Right on target with the volcanic guess. Here is a follow up article
from the same newspaper;

http://www.concordmonitor.com/apps/pbcs.dll/article?AID=/20080315/NEWS01/803150313

Monitor staff
March 15, 2008 - 12:00 am


This formation in Nottingham's Pawtuckaway State Park is the core of
an ancient volcano, according to a state geologist.
Zoom
        
Related articles:
        
Web surfer spots mysterious crater (3/14/2008)
        
        
The circular topography of Pawtuckaway State Park in Nottingham is not
a meteor impact crater, as Pembroke resident Stephen Dupuis publicly
pondered in a Monitor article yesterday. It is the core of an ancient
volcano, said State Geologist David Wunsch.

He said the volcano was active in the Cretaceous Period - 100 million
to 150 million years ago. Although he said it was good that recent
technological breakthroughs made it easier for the public to virtually
explore, he also identified a risk.

"We have had several of these types of calls with the advent of Google
Earth, which has allowed people to look at their wonderful world
easier," Wunsch said, "but it also leads to more erroneous
observations. It exemplifies the need for more enhanced earth sciences
at our schools."

The Ossipee Mountains are a similar formation, he said, technically
called a "ring dike."

"It's kind of like the neck of an ancient volcano," Wunsch said. The
formation was once molten magma beneath a much, much larger mountain.

"When rocks (in an ancient mountain) erode or weather, it tends to
form this round, circular pattern," he said.

The ring dikes were only one example he gave of a drastically
different landscape.

"The White Mountains and the Appalachians are really just remains," he
said. "They probably rivaled the Rocky Mountains at one point, but now
all that is left is the core.

"Based on how much material we find around them that has eroded off
them, you can kind of reconstruct how big they were."

-- 
Mike
--
Mike Jensen
Jensen Meteorites
16730 E Ada PL
Aurora, CO 80017-3137
303-337-4361
IMCA 4264
website: www.jensenmeteorites.com
On Mon, Mar 17, 2008 at 6:45 AM, Pete Pete <rsvp321 at hotmail.com> wrote:
>
>
>  Without reading about the geology for the area yet, I'd bet it's a volcanic origin - I see another similar feature at
>  43:17'15.93" N
>  71:11'03.00"W
>
>  Cheers,
>  Pete
>
>
>
>
>  > From: rsvp321 at hotmail.com
>  > To: meteorite-list at meteoritecentral.com
>  > Date: Mon, 17 Mar 2008 06:59:50 -0400
>  > Subject: [meteorite-list] Possible Ancient Impact Crater USA
>
>
> >
>  >
>  > Hi, All,
>  >
>  > This news item was released a few days ago, and was discussed somewhat on another List I subscribe to.
>  > Any thoughts?
>  >
>  > The coordinates are:
>  > 43:06'42.49" N
>  > 71:11'24.44" W
>  >
>  > A Google Earth search for Nottingham, New Hampshire, will land you just east of the site.
>  > At twelve km. altitude it just comes into view on the left.
>  >
>  > When tilted, the structure is quite evident - I just wonder how it was overlooked for so long!
>  >
>  > Cheers,
>  > Pete
>  >
>  >
>  >
>  > http://www.concordmonitor.com/apps/pbcs.dll/article?AID=/20080314/NEWS01/803140369
>  > http://www.concordmonitor.com/apps/pbcs.dll/article?AID=/20080314/NEWS01/803140369
>  >
>  > A Pembroke man was playing with Google Earth - an online digital map of the planet - when he came across something that seemed out of this world: an apparent meteorite crater in Pawtuckaway State Park in Nottingham.
>  >
>  > "I was just searching around on Google, looking at lakes, because I'm a sailor," said Stephen Dupuis, 52. "As I was panning down through the landscape, it kind of caught my eye."
>  >
>  > Dupuis, a multimedia artist, has been fascinated with astronomy and outer space since his father, a former engineer, built the heat shields used for the Apollo spacecraft in the 1960s.
>  >
>  > What he saw in Nottingham stirred his interest. He researched impact craters online and wrote to the Earth Impact Database, which is run out of the University of New Brunswick. Nobody has responded yet.
>  >
>  > "They didn't show anything in New Hampshire," he said of the database's maps. "Maybe somebody now will look at this and say, 'Hey that is a crater.' "
>  >
>  > So far, Dupuis is favoring a scientific explanation for the site.
>  >
>  > "There were no crop circles and no flying saucers involved with it," he said.
>  >
>  > ETHAN WILENSKY-LANFORD
>  >
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Received on Mon 17 Mar 2008 11:32:06 AM PDT