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Showing results for tags 'indiana?'.
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OK so I'm very new to basically everything about rocks and fossils. And my questions might seem ridiculous to some and I'm sorry. OK are all rocks that have crystal inside geodes? I know what round cauliflower looking geodes are. But are there untraditional ones that aren't round. And I'm find huge huge coral fossils and some other that are swirly . They all seem to have quartz inside . I guess I'm wondering are they all crystal inside and what's the best way to see without using acid and ruining the fossil itself. Cut them? I'll attached a few pics and more tom when i goto the creek . Some are still connected to the flat rock bottom of the creek.
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- coral fossil
- geodes
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Hi, This is an historic specimen collected in the 1870s or 1880s. Unfortunately, it has no provenance. I suspect it might be from northern Illinois or Southern Indiana. Any help on ID would be much appreciated. I was thinking along the lines of Lobatopteris or Pecopteris strongii?
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- concretions
- illinois?
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