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Alethopteris Fern Fossil
Alethopteris fern frond in siltstone — Image via Wikipedia: Alethopteris
Rarity: Common
Date
c. 310 million years BP
Object Type
Fossil
Medium / Material
Carbonised plant impression in siltstone
Production Place
St. Clair, Schuylkill County, Pennsylvania, USA
Dimensions
H 150 × W 110 × D 15 mm · 420 g
Condition
Good
Pinnate fern-like fronds preserved as a carbonised film on a split siltstone slab from the coal measures of Pennsylvania.
Materials & Techniques
Siltstone with carbonaceous residue
Location
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