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Title: Sigillaria Fossil
Caption: Bark of Sigillaria, a genus of extinct, spore-bearing, arborescent (tree-like) plants of the Caboniferous Period, Pennsylvania Epoch. Field of view 3"; collected in Sullivan County, Pennsylvania. Specimen courtesy of Pennsylvania State Museum, Lose Coal Fossil Collection.
Category: Geology & Fossils
Credit: Album / Science Source / Theodore Clutter
Image size: 3000 × 4466 px | 38.3 MB
Print size: 25.4 × 37.8 cm | 1181.1 × 1758.3 in (300 dpi)