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Alethopteris sullivantii (Lesquereux)
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Products description
| This is a plant fossil concretion with a tree fern of the spcies Alethopteris sullivantii from Mazon Creek. | |||
Location: | Mazon Creek, Braidwood, Illinois , USA | ||
| Size of concretion : | about 71 x 58 mm | ||
| Age: | Upper Carboniferous, Pennsylvanian , Carbondale Fm. (about 300 Ma) | ||
Product no.: 8674