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Post by Jugglerguy on Jul 22, 2018 17:06:30 GMT -5
I think the answer to that question is "no", but I found an interesting rock last week in Lake Superior. I thought it was just red jasper. When I cut two very small cuts, it turned all of my oil very red. I cut one just before it that looked similar but I didn't notice any color change in the saw oil. So I think this has iron in it, and it looks sort of like a plain Mary Ellen jasper to me. Any thoughts?
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Post by Jugglerguy on Jul 22, 2018 17:35:14 GMT -5
I forgot to tag toiv0, the authority on Mary Ellen jasper.
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Post by toiv0 on Jul 22, 2018 19:55:15 GMT -5
I do think this looks like a ME. I don't know why you wouldn't have it there. I found some South West of Grand Rapids.
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Post by Jugglerguy on Jul 22, 2018 20:28:49 GMT -5
I do think this looks like a ME. I don't know why you wouldn't have it there. I found some South West of Grand Rapids. I thought it was only found in Minnesota.
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Post by toiv0 on Jul 22, 2018 21:05:24 GMT -5
I do think this looks like a ME. I don't know why you wouldn't have it there. I found some South West of Grand Rapids. I thought it was only found in Minnesota. It originally got its name from the Mary Ellen Mine in Northern MN. It is found in all the mines in the area and also spread by the glaciers southward. I am sure it is sourced in most iron producing areas across the northern tier. I know there is a plenty to be found in central WI and the UP. The material is fossilized algae. The stomatalites (algae)are found in many states but what makes them red is the iron which gives them its color. There is also green from up here and not sure what the impurity is that gives it that color.
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Post by MsAli on Jul 22, 2018 22:45:56 GMT -5
Looks like MEJ to me The green is from the blue-green algae from the Measbi range
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