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Tropical Illinois

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Fossil or Pseudofossil?

Sometimes mineral patterns in rocks look very much like fossils. See if you can spot the real fossils from the look-alikes.

Date: 05/18/2006
Size: 10 items
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Is it dendritic shale or a fern fossil?

Is it dendritic shale or a fern fossil?

Date: 05/18/2006
Views: 907
Is it a fern or dendritic shale?

Is it a fern or dendritic shale?

Date: 05/18/2006
Views: 549
Are they gizzard stones or water polished rocks?

Are they gizzard stones or water polished rocks?

Date: 05/18/2006
Views: 763
Are they gizzard stones of water-polished rocks?

Are they gizzard stones of water-polished rocks?

Date: 05/18/2006
Views: 528
Is it coral or weathered travertine?

Is it coral or weathered travertine?

Date: 05/18/2006
Views: 529
Is it coral or weathered travertine?

Is it coral or weathered travertine?

Date: 05/18/2006
Views: 510
Is it a horsetail leaf or marcasite crystals?

Is it a horsetail leaf or marcasite crystals?

Date: 05/18/2006
Views: 504
Is it horsetail foliage or marcasite crystals?

Is it horsetail foliage or marcasite crystals?

Date: 05/18/2006
Views: 572
Is it a concretion or a turtle shell?

Is it a concretion or a turtle shell?

Date: 05/18/2006
Views: 642
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