Found this on the shore of Lake Michigan near Milwaukee. Thought the fractures were cool and curious if anyone knows what this might be.
Rock with dark fractures
- Thread starter love2velo
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DDancer
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- Mar 25, 2014
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Huhh, missed this post. Appears to be a fractured bit of quartzite that's be polished by erosion either from the lake waters or possibly part of a glacial deposit. A cobble stone 
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