Posts tagged ‘Mississippi’

November 15, 2016

Indian Mounds Park

GEOLOGY OF MINNESOTA AT THE MOUNDS (AS DESCRIBED IN A PLAQUE ON THE BLUFFS ABOVE THE MISSISSIPPI) indian_mounds_plaque THIS POINT COMMANDS A VIEW OF ONE OF THE GREAT WATER COURSES OF NORTH AMERICA.  THE STREAM WHICH ONCE FILLED THIS VALLEY NAMED THE RIVER WARREN WAS LARGER THAN ANY RIVER ON THE CONTINENT TODAY. DURING THE PAST MILLION YEARS MINNESOTA HAS BEEN PARTLY COVERED BY GLACIERS AT LEAST 4 TIMES. THE SHORT SUMMERS AND LONG WINTERS OF THE GREAT AGES CAUSED AN ACCUMULATION OF SNOW AND ICE TO A THICKNESS OF SEVERAL THOUSAND FEET. AS THE CLIMATE MODERATED AND GLACIATION CAME TO AN END ENORMOUS QUANTITIES OF WATER WERE RELEASED TO FLOW IN RIVERS AWAY FROM THE ICE FIELD.  THE VALLEY OF THE MISSISSIPPI FROM THIS POINT WAS ERODED BY SUCH A STREAM ABOUT 2000 YEARS AGO SCOURED TO A DEPTH OF 100 FEET BELOW THE PRESENT RIVER SURFACE. THE VALLEY WAS LATER FILLED BY SAND AND GRAVEL AS THE FORCE OF THE TORRENT SUBSIDED.

 

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October 25, 2015

As we approach a decision on the Polymet Copper Mine …

Mn lake and loon

As Governor Dayton proposes funding for a study to determine Polymet’s finances at the present moment, I wonder how possible it would be to determine those finances into the distant future? Are there any reassurances possible that will predict this corporation’s ability or willingness to clean up the inevitable long term effects of copper mining pollution, into perpetuity? Shouldn’t we consider the already abundant information that promises otherwise?

Grateful that the Governor will be exploring other mines in other areas, I wonder,  is there any other area quite like that proposed in St Louis County on the borders of the Boundary Waters Wilderness Area?  Pollution from mining ore has already done harm in this ecologically fragile area, at the heart and head of three great rivers, and Lake Superior, along Giants Ridge and the Laurentian Divide, in the Arrowhead region of Minnesota.

Will we learn from our own experience and say no to any further degradation of an area so rich in natural beauty and a most essential commodity, water?

You will find several articles linked below concerning this area and the proposed copper mine::

http://www.mprnews.org/story/2015/06/29/polymet-dayton

http://www.kare11.com/story/news/politics/2015/10/24/tour-of-mines-precedes-daytons-tough-polymet-decision/74538374/

http://www.hibbingmn.com/news/local/dayton-all-in-on-polymet/article_04a57e9a-79f0-11e5-ab2d-4fb882a0a823.html

http://blogs.twincities.com/politics/2015/10/22/dayton-undecided-polymet-says-ultimate-decision-will/

https://anitatillemans.wordpress.com/?s=Arrowhead

June 27, 2013

Land of Frac Sand (SE Minnesota Bluff Country)