Primary sedimentary structures are visible. Interpret the environment of deposition. Interpret the geologic history subsequent to deposition.
310-Ma Mariopteris from Poland. Sample collected by Andrezej Gorski.
310-Ma Annularia radiata from Poland. Collected by Andrezej Gorski.
Mariopteris, most likely Mariopteris nervosa, a liana-type seed fern from the early Carboniferous.
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