[meteorite-list] RE: NWA 12-18-1950 CHUBB Crater Discovered

[Charles O'Dale]

In 1966, 1986 and 1988, impact melt samples were recovered from the crater 
area. 40Ar-30Ar dating gives an impact date of 1.4 +/1 0.1 Ma.

REF:
Impact melt rocks from New Quebec Crater, Quebec, Canada - Richard Grieve, 
Richard Bottomley, Michel Bouchard etc (1990)
Authentication controversies and impactite petrography of the New Quebec 
Crater - Ursula Marvin, David Kring (1992)

The crater is renamed (again) - Pingualuit

http://www.ottawa.rasc.ca/astronomy/earth_craters/pingualuit/index.html

Charles O'Dale
Meeting Chair
Ottawa RASC
http://www.ottawa.rasc.ca/astronomy/earth_craters/index.html



> Date: Mon, 17 Jan 2005 17:29:30 -0600
> From: "MARK BOSTICK" <thebigcollector at msn.com>
> Subject: [meteorite-list] NWA 12-18-1950 Chudd Crater Discovered
> To: meteorite-list at meteoritecentral.com
> Message-ID: <BAY4-F5AAB06052708219E11F59B38E0 at phx.gbl>
> Content-Type: text/plain; format=flowed
>
> Paper: Reno Gazette
> City: Reno, Nevada
> Date: Monday, December 18, 1950
> Page: 4
>
> Meteorite Crater? Stories of Skies
> By J. HUGH PRUETT
> Astronomer, Extension Division,
> Oregon Migher Education System
>
>     Huge depressions surrounded by high rims of broken rock and situated 
> on
> otherwise level plains have been found In several places on the earth. In
> recent times it seems certain that these have been blasted out by the
> descent of stony or metallic missiles from the great inter-planetary 
> spaces.
>     The best known of about a dozen such holes is the famous Barringer
> Meteorite crater in Arizona, an almost circular depression approximately
> 4000 feet across. The top of the rim varies from 120 to 160 feet above the
> surrounding plain and the inside floor is about 600 feet below the rim.
> Terrific upheaval of the original strata occurred at the time of impact 
> for
> huge boulders, some as large as an ordinary house, make up a considerable
> part of the rim. In the rim and scattered for miles around on the plain,
> tons of metallic meteorites have been found.
>     Now we learn of another crater, recently discovered in the
> north-western part of Quebec sound of Baffin Island, which dwarfs
> considerably the Arizona depression. It is about 2 ½ miles across from rim
> to rim, and the top of the rim stands 550 feet above the plain. Unlike the
> Arizona crater, this latest depression contains a lake, the surface of 
> which
> is somewhat higher than the surfaces of the numerous small lakes in the
> surrounding plain. Last June when it was first examined by a scientific
> expedition, the water surface in places was covered by ice three feet 
> thick.
>     It is said that this crater, which is located in an unfrequented part
> of the world, was first noted on aerial photographs by a prospector Fred 
> W.
> Chubb. This was reported to the Globe-Telegram of Toronto. This paper was
> instrumental in organizing a scientific expedition, which included Dr. V.
> Ben Meen of the Royal Ontario museum.
>     Although no meteorites have been found among the boulders of rim or on
> the surrounding plain during the short preliminary investigation, Dr. Meen
> feels quite certain the formation is due to the action of a huge meteorite
> and is not volcanic in nature. He believes the tearing from the plain of
> likely ten billions of tons of granite which forms the rim, took place
> sometime between 1000 and 3000 B.C.  Further study is planned next summer
> when magnetic methods will be used to try to locate meteoritical material
> and to determine if a large mass is likely beneath the lake. The 
> scientists
> are sure no glacial action has taken place since the crater was formed.
>     The explorers hoped they were the first campers ever in that locality,
> but the finding of a tin can blasted their hopes. One member in anger 
> threw
> it away. Later when they wanted to see if it contained a message, they 
> could
> not find it.
>     Excellent pictures of the crater and the exploring party are carried 
> in
> the October number of Griffith Observer published in Los Angeles. Time for
> Aug. 14 and other publications discussed the subject.
>
> (end)
>
> Clear Skies,
> Mark Bostick
> Wichita, Kansas
> http://www.meteoritearticles.com
> http://www.kansasmeteoritesociety.com
> http://www.imca.cc
>
> http://stores.ebay.com/meteoritearticles
>
> PDF copy of this article, and most I post (and about 1/2 of those on my
> website), is available upon e-mail request.
>
> The NPA in the subject line, stands for Newspaper Article. The old list
> server allowed us a search feature the current does not, so I guess this 
> is
> more for quick reference and shortening the subject line now.
>
>