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Post by Jugglerguy on Apr 20, 2018 15:28:19 GMT -5
I had no idea that Lake Michigan had agates. Do you have more closeups? Do they tumble well?
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Post by fernwood on Apr 20, 2018 15:40:19 GMT -5
Used to find a lot of Lake Michigan beach agates when I lived in Sheboygan Falls. Also a lot of garbage, lol. Walking the beaches and areas near fishing piers were a great family pass time. The agates were similar to Lake Superior Agate/Chert mix. Lots of banding, but the brilliant colors were limited, as were quartz areas.
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Post by snowmom on May 28, 2018 18:29:46 GMT -5
The so called agates in the news articles are chert nodules, the banding is leisgang banding... sometimes true great lakes agates are found as glacial transports in Huron, Erie, and Michigan, but they are rare. Fossiliferous chert which started life as stromotolite or stromatoporoid seem to make up some of the so called agates. close inspection of the photos in news articles etc reveal they are simply chert. Chert being microcrystaline silica, its composition is indeed similar to agate, and both chert and agate are sedimentary in nature... but agate's mother is basalt and chert's is limestone or calcium carbonate sediment. quartzpage.de/ has good info to help clarify
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fuss
spending too much on rocks
Member since October 2018
Posts: 250
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Post by fuss on Oct 19, 2018 23:28:00 GMT -5
If I could figure out how to post images here....... I would post several pictures of what i believe are the same thing as in the article, though found north of Milwaukee.
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fuss
spending too much on rocks
Member since October 2018
Posts: 250
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Post by fuss on Oct 20, 2018 8:54:36 GMT -5
see if this works..nope
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fuss
spending too much on rocks
Member since October 2018
Posts: 250
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Post by fuss on Oct 20, 2018 13:02:59 GMT -5
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