Exceptional Artifact & Collectible Auction

1 1/8" Mazon Creek Annularia Fossil (Both Halves) Beautiful Whorl Preservation 307 Million Yrs Old

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Start price: $10

Estimated price: $10 - $10,000

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Well preserved Annularia fossil from the world famousMazon Creek of Illinois

Carboniferous Period about 307 million years old

This specimen shows the classic rounded leaf whorl ofAnnularia a member of the ancient calamite horsetail family

Both halves of the siderite nodule are included and each showsthe fossil impression clearly

The leaflets are short rounded and arranged in a circular whorlgiving the piece a flower like appearance which makes Annulariaone of the most visually appealing Mazon Creek plants

Ex Field Museum of Natural History Chicago

HA stands for the Hoard Anderson collection one of the largestprivate collections of Mazon Creek fossils donated to themuseum in 1978

The museum later deaccessioned much of the collection to raisefunds for projects

Condition: Authentic