Fossils in thin section

Barnacles in thin section

Ribbed plates that can look folded and tooth-like in cross section.

**Barnacle in a grainstone (PPL).** Michael C. Rygel via Wikimedia Commons, CC BY-SA 4.0. Source

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All fossil groups Carbonate classification

Sources

Rygel & Quinton, Sedimentary Geology 9.7: Fossils in Thin Section