Slate and greywacke at Jay Cooke State Park
Layers of slate and greywacke—also known as "dirty sandstone"--stick out of the St. Louis River at Jay Cooke State Park.
Photo courtesy of Mark Jirsa, Minnesota Geological Society
Please contact us if you have questions about the rights on this image.
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i really like the picture
Me too!!
The pics are really COOL!
I really like the picture and I think it's cool, too!!
i like the rigid rocks in the front and the colorfull trees in the backround...awosmlyawsome!!!!!
I would love to visit this place!
I am told that this geologic formation draws people from around the world and is a rare wonder.
wow this is really pretty I want to go and see this some day
Wow, what a fantastic picture. the colors in the background are amazing!
very nice picture!!
Amazing photo! Nature can astound...
thank you for the viewing. i am researching minerals of minnesota.
Neat.
Jay Cooke Park is far out man.
THIS LOOKS AS IF IT WHERE CREATED UNDER PRESSURE BY WATER PRESSING SAND TOGETHER OR BY A VALCAINC GLASS SUCH AS PUMICE CRUSHED FOR HUNDREDS OF YEARS UNDER THE GLACERS OF THE ICE AGE
LOVE THE PICTURE I WANT TO SEE IT
this looks cool i wish i could see it someday
This picture is cool! I'm gonna go see it one day when i grow up...
that photo is really really really really cool!!!!!!! my grandma and grandpa went there yesterday it looks like shark teeth!!!!!!!.
the rocks must have taken a long time to make them this beautiful!!!!!!!!!!!!!!!!!
my friend has been here before i havent and dese rocks ROCK. they be fun to walk on [from friend] I would really like to go there sometime, it's by Duluth.
Great picture too.
I'LL BE BAAACH!
wow.....what are you talking about? seriously, what are dese rocks?
I believe it is a reference to the photo at the top of the page.
they are sandstone rocks
THIS PICTURE IS SO COOL! i LOVE THE PICTURE IT'S BEATIFUL.
WELL CATCH YOU LATERZ!
austin tells his mom to type.......
My son Austin saw pictures of rocks that was from a long time ago.
The golden silver kind are his favorite.
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