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Fossils ➔ Pecopteris unita


A siderite concretion that was split open to reveal an impression of a fern (consists of 2 halves, labeled A and B). 

Mazon Creek, IL is a famous fossil locality containing plants and animals from 309 million years ago. These fossils formed from a large flooding event that rapidly buried organisms, allowing for soft parts to be preserved.

ID confirmed by R. Lee August, 27 2019. 

Current Location Status:
In Storage
Collection Tier:
Tier 3