Sedimentary rocks near Wabasha bridge
Walk another two blocks east to the Wabasha bridge. There you can see layers of different rock, laid down by a tropical ocean 470 to 440 million years ago. From top to bottom: the Decorah shale (fine clay from mid-level depths); Platteville limestone (dissolved shells from deep water); Glenwood shale; and St. Peter sandstone (sand from shallow water).
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St. Peter Sandstone
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I CAN'T IMAGINE THAT UNDER CROWN PLAZA HOTEL THERE WAS LAYERS OF ROCK, THAT ARE 470 YEARS OLD.
I HAVE WENT TO THE CROWN PLAZA HOTEL BUT I DIDN'T KNOW THIS UNTIL NOW.
this sculpture is amazing. i DIG it!
i've been in the wabasha bridge and it's like a step into the past!
wow.
its iight. i dont really agree... but if you like it thats your choice. i think that they should have put more interesting pictures on here but... i dont mind looking at them dont get me wrong, its just that this picture could be better.
I thought the wabasha rocks were really cool!
wow that is very fasanating i never new that
THIS IS A COOL ROCK!
I WANT ONE
I really like this "sculpture". I would like to go down to that bridge and collect a few samples.
Rocks rock!
this is such a cool thing it is so to see i think it rocks
it's fun i really enjoy it I Think it is good for people
i didn't know that there were that many different kinds of stone, and what they were made of. i mean, is a 7th grade kid supposed to know all of this kind of stuff? it doesn't matter now, because i know them allafter reading that interesting paragraph. i would like to know, how does the sand/rock/debris get squished iinto that packed state of being?
this was really intersting and cool!!!!
Cool i would like one
this is boring. its a rock.
neato!!!!
It's preposterous to think oceans once covered Minnesota.
Please explain, then, why people digging for fossils here continually find samples of shell fish.
Cretaceous Inland Sea, anyone?
Heh, the most intresting thing I find about this is the scenario of someone climbing it and falling. But a very intriguing formation.
wouldnt this be cool to live on
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