Rock Identifier
Lepidodendron Fossil (Scale Tree) (Lepidodendron sp.) — fossil
fossil

Lepidodendron Fossil (Scale Tree)

Lepidodendron sp.

AI-generated identification · may be incorrect

Hardness: 3-4 (variable depending on mineral replacement); Color: Greenish-brown (likely due to algae/moss), tan, or grey; Luster: Dull/Earthy; Structure: Diamond-shaped or oval leaf scars resembling reptile scales.

Hardness
3-4 (variable depending on mineral replacement)
Color
Greenish-brown (likely due to algae/moss), tan, or grey
Luster
Dull/Earthy
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Physical properties

Hardness: 3-4 (variable depending on mineral replacement); Color: Greenish-brown (likely due to algae/moss), tan, or grey; Luster: Dull/Earthy; Structure: Diamond-shaped or oval leaf scars resembling reptile scales.

Formation & geological history

Formed during the Carboniferous period (approx. 300-360 million years ago) in swampy, tropical environments. The diamond patterns are scars left by fallen leaves as the tree grew.

Uses & applications

Scientific study, educational displays, and private collections. These fossil plants are also the primary component of many coal deposits.

Geological facts

Lepidodendron trees could grow up to 100 feet tall and lived in the massive 'coal swamps' of the Paleozoic Era. They are often mistaken by amateurs for fossilized dinosaur or dragon skin.

Field identification & locations

Identified by the distinct, repeating geometric leaf scar pattern. Commonly found in coal-bearing regions such as Kentucky, West Virginia, and Pennsylvania. Its heavy weight is due to mineral replacement (permineralization) of original plant tissue.

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