To explore a gigapan of this sample's edge, showing the ancient tree's rings, click here:
To explore a gigapan of this sample's face, click here:
This is the same specimen as seen in gigapan.com/gigapans/179946, but shot at a higher zoom.
To explore this sample in greater detail, click here:
Fossil seed fern, or "tree fern," from Brazil. Imaged at NOVA Annandale by Robin Rohrback-Schiavone as part of the Paleoplant Project.
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