Psaronius Trunk 1b
By Stocksdale
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Trunk of a tree encrusted with coal at its base. The tree is either psaronius (tree fern) or medullosa (seed fern).
Location: spoil pile of underground coal mine in central part of the "Mazon Creek Area".
Formation: Francis Creek Shale in the carbondale formation
Age: Aprox. 309 mya
Photo Information
- Taken with Apple iPhone 4
- Focal Length 3.9 mm
- Exposure Time 1/120
- f Aperture f/2.8
- ISO Speed 100
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