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Old 10-08-2014, 09:56 PM   #1
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Adding rocks from outdoor!

Does any one know what kind of rocks these are? They pass the vinegar test.


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Old 10-08-2014, 09:58 PM   #2
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Old 10-09-2014, 11:20 AM   #3
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My geology experience is telling me that those are slate.. should do well in a tank after a little scrub


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Old 10-09-2014, 02:18 PM   #4
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slate/shale is what they look like to me
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Old 10-09-2014, 11:45 PM   #5
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Awesome. I've been researching them. I found that they are argillite, which I believe is another name for slate. There is a wonderful "rocks of North Carolina" website. Maybe those who are trying to identify their own rocks can look for a rocks of "state".

Thanks again. I think they will do well in my tank.


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Old 10-10-2014, 05:58 AM   #6
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Just in case - if they are soft, I would soak one in a bucket for a few days and make sure it doesn't disintegrate. I had some nice fossils in mudstones that were soaked for me and completely fell apart.
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