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Post by snowmom on Oct 31, 2014 5:21:39 GMT -5
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Post by snowmom on Oct 31, 2014 6:25:07 GMT -5
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Post by snowmom on Oct 31, 2014 6:59:38 GMT -5
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Deleted
Deleted Member
Member since January 1970
Posts: 0
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Post by Deleted on Oct 31, 2014 8:34:05 GMT -5
Great read over cappuccino and pop tarts. lol I have a couple of unexplained/unidentified pieces that look similar to some of the ites shown in the articles. Two I have tossed recently and now have to retrieve but they are close by.
Thanks for posting this. It could answer a few questions. You have been digging pretty hard. lol Jim
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Fossilman
Cave Dweller
Member since January 2009
Posts: 20,681
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Post by Fossilman on Oct 31, 2014 8:36:52 GMT -5
I cut some for "D".................I have mine in the yard rock pile somewhere.........Very interesting information...
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Post by snowmom on Nov 1, 2014 8:33:10 GMT -5
www.hou.usra.edu/meetings/sudbury2013/pdf/3092.pdfMichael, that is Onaping igneous formation rock! Now I am wondering how much of what I am finding is glacier transported, and how much was thrown here when the impact occurred. I noticed a huge shatter cone rock on the beach the other day and marveled at the force that should have occurred to make it happen. Now I have to go back and take pictures. (might have been glacier action, but the stress patterns on the rock should tell me, now I have a better idea of what I was looking at) Going to have to start taking pictures every time I go out.
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Post by snowmom on Nov 3, 2014 5:23:50 GMT -5
Lesson learned, the more I am finding out about the local geology the better I am going to get at rock hunting. I went out hunting yesterday using my newly opened eyes to look for impactites and other related rocks. Going out again today. Not many good hunting days left before everything is covered with ice. Look at this map! www.mngs.umn.edu/meteoriteimpact.pdf Alpena located at the northeastern tip of the mitt where the indentation for Thunder Bay is shown clearly on this map. Much closer than the location in Minnesota discussed on the map. In my reading of local geology no mention whatsoever of the Sudbury impact was mentioned. This information is already helping me understand so many of the odd and otherwise unexplainable things I find in this area. If you are in the Great Lakes region at all, this probably also pertains to your own hunts. The debris from this event is believed to have covered at least 500 miles, and glaciers may have transported some of it even farther. Hope this helps somebody else as much as the information has helped me. (or maybe you already knew!)
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Post by snowmom on Nov 9, 2014 17:53:40 GMT -5
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Post by mohs on Nov 9, 2014 18:07:03 GMT -5
just this quick statement from that lengthy geological thesis indicate that rocks got thrown far & wide
Interesting how zircon can be pressurized to change its mohs hardness
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Post by snowmom on Nov 9, 2014 18:18:22 GMT -5
www.agu.org/books/gm/v095/GM095p0343/GM095p0343.pdfand I wonder if the stuff I found thinking/hoping for jade is glass formed under pressure, thus very hard and dense? It puts everything in a very different light. Raises a multitude of questions. much more research necessary. ( love it!)
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