Free Republic
Browse · Search
News/Activism
Topics · Post Article

Skip to comments.

Meteorite impact debris found in Minn. (from Sudbury impact in Canada, 1.85B Years ago)
AP on Yahoo ^ | 7/16/07 | AP

Posted on 07/16/2007 9:41:55 AM PDT by NormsRevenge

GRAND MARAIS, Minn. - A forest fire has led to a chance discovery of debris from the impact of a meteorite 1.85 billion years ago, more than 450 miles away at Sudbury, Ontario.

Geologists had scheduled a field trip in May along the Gunflint Trail in northeastern Minnesota, but most areas they wanted to explore were closed because of a wildfire that charred more than 118 square miles.

Geologist Mark Jirsa of the Minnesota Geological Survey went up the trail to scout new locations and, in a spot he had never visited before, stumbled across debris now linked to the Sudbury impact.

That impact created a crater more than 150 miles across, scattering rock and dust over nearly a million square miles.

"It's fairly dark rock," Jirsa said. "They look like concrete, but in this concrete you would throw pieces of rock of all sizes and shapes and in all possible orientations."

Previously, material thrown out by the impact had been found as far from Sudbury as Hibbing, about 125 miles farther to the southwest from Grand Marais. However, the tiny fragments at Hibbing were found in core samples from 800 to 1,000 feet below the surface, while the rock layer containing larger chunks at the Gunflint site lies exposed.

"I think the excitement for the people of Minnesota is that we are one place in the world where you can see evidence of an ancient meteorite impact," said University of Minnesota geology professor emeritus Paul Weiblen, who is studying the debris. "This is the second-oldest and second-largest impact crater in the world."


TOPICS: Canada; Miscellaneous; US: Minnesota
KEYWORDS: 1point75billion; 1point839999billion; 1point85billion; 1point8billion; 1point9billion; catastrophism; debris; deepimpact; grandmarais; gunflint; impact; meteorite; sudbury

1 posted on 07/16/2007 9:41:57 AM PDT by NormsRevenge
[ Post Reply | Private Reply | View Replies]

To: NormsRevenge

Can’t be. The earth is only 9,000 years old. /sarcasm


2 posted on 07/16/2007 9:49:57 AM PDT by Rodney King (No, we can't all just get along.)
[ Post Reply | Private Reply | To 1 | View Replies]

To: Rodney King

Thought it was 6,000 but made to look several billion...


3 posted on 07/16/2007 9:51:27 AM PDT by The Louiswu (Never Forget!)
[ Post Reply | Private Reply | To 2 | View Replies]

To: NormsRevenge

Bush’s Fault.


4 posted on 07/16/2007 9:52:48 AM PDT by Cyber Liberty (Did Dennis Kucinich always look like that or did he have to submit to a series of shots? [firehat])
[ Post Reply | Private Reply | To 1 | View Replies]

To: NormsRevenge

Minnesota - #2 in meteor fragments over 1 billion years old. Congrats.


5 posted on 07/16/2007 10:08:45 AM PDT by Waverunner ( "Think for yourselves and let others enjoy the privilege to do so too." Voltaire)
[ Post Reply | Private Reply | To 1 | View Replies]

To: Rodney King

Hmmm.

Looks to be in pretty good shape for nearly two billion years old. Even figuring 1.5 billion, It should have seen 1500 ice ages, no?

6 posted on 07/16/2007 10:31:47 AM PDT by labette
[ Post Reply | Private Reply | To 2 | View Replies]

To: Rodney King

A billion here, a billion there — pretty soon you’re talking about a long time.


7 posted on 07/16/2007 10:33:27 AM PDT by BenLurkin
[ Post Reply | Private Reply | To 2 | View Replies]

To: NormsRevenge

My first thought is that it must have been remnants of Mondale’s presidential run... 8^)


8 posted on 07/16/2007 10:44:52 AM PDT by jonno (Having an opinion is not the same as having the answer...)
[ Post Reply | Private Reply | To 1 | View Replies]

To: Rodney King
Can’t be. The earth is only 9,000 years old. /sarcasm

Disclaimer: I am not a geologist, a cosmologist or a climatologist, but I am very familiar with the Sudbury Crater as a result of morons commenting on the "toxic" nickel used in hybrid car batteries...

First of all, the age of 1.85 billion years for the impact introduces ridiculously complex factors into the find.
At least three glaciations took place affecting the entire area since then. Finding evidence of the impact there is meaningless. How far did the glaciers move the stuff? Was it in a terminal morraine?
Shouldn't the fragments be long buried?
Could these be evidence of secondary impacts (calving) not subject to glaciation?

Who's on first?

9 posted on 07/16/2007 11:35:34 AM PDT by Publius6961 (MSM: Israelis are killed by rockets; Lebanese are killed by Israelis.)
[ Post Reply | Private Reply | To 2 | View Replies]

To: 75thOVI; aimhigh; Alice in Wonderland; AndrewC; aragorn; aristotleman; Avoiding_Sulla; BBell; ...
Note: this topic is from 2007. Nobody tells me nothin'. Thanks NormsRevenge.
 
Catastrophism
 
· join · view topics · view or post blog · bookmark · post new topic · subscribe ·
 

10 posted on 02/16/2011 6:13:06 PM PST by SunkenCiv (The 2nd Amendment follows right behind the 1st because some people are hard of hearing.)
[ Post Reply | Private Reply | View Replies]

To: SunkenCiv
Note: this topic is from 2007

Yeah, now the impact was 1,850,000,004 years ago. Makes a ton of difference. :)

11 posted on 02/18/2011 4:36:56 AM PST by TN4Liberty (My tagline disappeared so this is my new one.)
[ Post Reply | Private Reply | To 10 | View Replies]

To: NormsRevenge

The little fellow is happy to have avoided ending up in a Prius battery.


12 posted on 02/18/2011 4:51:05 AM PST by Rebelbase
[ Post Reply | Private Reply | To 1 | View Replies]

Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.

Free Republic
Browse · Search
News/Activism
Topics · Post Article

FreeRepublic, LLC, PO BOX 9771, FRESNO, CA 93794
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson