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Showing results for tags 'cleaning stromatoporoid'.
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Hi, I recently found several small stromatoporoid fossils while hiking in an area of glacial kames, NE Illinois. The fossils I find here have been buried in silt, sand and clay for about a hundred thousand years, and they're sponges! But I love them! They're entirely silicified, vinegar, clr, and muriatic acid does nothing to them. They aren't in matrix, they're just very, VERY, dirty. I may have to accept some as they are, but was hoping a could do more for the ones that are less porous. Already soaked them in SIO and it did whiten them a bit. First pics are before SIO soak. I've been reading about oxalic acid, boiling, chlorine bleach, H2O2...not sure if anything else will work besides patience and a toothbrush... *Also, this is just a hobby so I don't have any equipment other than a dremel, some picks and wire brushes.
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- cleaning stromatoporoid
- glacial till
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