Here is another plant fossil that Shamalama found that is very nice. It is taking me a while to read the section on vascular plants in the
Fossil of Ohio book. I am guessing this might be a
Pecopteris or
Alethopteris from the Late Carboniferous or Pennsylvanian period. It was found in Schuylkill County, Pennsylvania in the Llewellyn Formation.
This frond was preserved in a swamp like environment that allowed its organic parts to be replaced by sulphides (pyrite) over time. Later the pyrite was replaced by aluminum silicate (pyrophyllite) giving it a white like look.
I attached a picture of a modern day fern I took for comparison.
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