|Ancient sandstone and shale formation containing Carboniferous fossils|
During the Carboniferous Period between 350 and 400 million years ago, plant life first appeared in what is now Illinois. Remnants of these primordial coal forests can be found today in shale and sandstone formations as fossils. Here are several examples including stigmaria:
|Examples of the earliest plant fossils, including stigmaria.|
Note: These large slab fragments break away through natural erosion as well as freezing and thawing.
350 million years ago, West Central Illinois was covered in seawater containing vast coral reefs which died out during a mass extinction at the end of the Paleozoic Era (about 250 million years ago.) It is from this period that fossilized coral was formed. Here are several examples from our Sustainable Stones collection:
|Examples of rough, cut and finished fossilized coral.|
For more on Sustainable Stones High Profile fossil cabochon collection please visit our shop:
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