File:Fossiliferous ferruginous sandstone (Lower Mississippian; Rt. 35 roadcut, northeast of Rittenours, Ohio, USA) 2 (40938940471).jpg
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Summary
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| Description |
Brachiopod fossil in ferruginous sandstone in the Mississippian of Ohio, USA. The fossil at left in this rock is a Rhipidomella brachiopod shell, preserved as an iron oxide-stained internal mold. Brachiopods are a group of sessile, benthic, filter-feeding, marine invertebrates. They first appear in Cambrian rocks and were abundant in Earth's oceans throughout the Paleozoic. They were also common in Mesozoic oceans, but are scarce in modern oceanic biotas. Brachiopods have two shells, called valves, that are usually calcareous (made of calcite - CaCO3 - calcium carbonate). Each shell of a brachiopod is bilaterally symmetrical, unlike each shell of a bivalve (clam). Prima facie, the rock looks like an ironstone, but it's more likely a ferruginous sandstone (I didn't keep the sample - my rock collection is too sizable already). Classification: Animalia, Brachiopoda, Articulata (a.k.a. Rhynchonelliformea), Orthida, Rhipidomellidae Stratigraphy: float from the Cuyahoga Formation (or possibly the lower Logan Formation), Lower Mississippian Locality: Rittenours Outcrop - large roadcut on the northeastern side of Route 35, northeast of the town of Rittenours, Jefferson Township, southeastern Ross County, southern Ohio, USA (39° 13’ 46.29” North latitude, 82° 49’ 57.15” West longitude) |
| Date | |
| Source | Fossiliferous ferruginous sandstone (Lower Mississippian; Rt. 35 roadcut, northeast of Rittenours, Ohio, USA) 2 |
| Author | James St. John |
Licensing
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/40938940471 (archive). It was reviewed on 7 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 18:15, 7 December 2019 | | 2,808 × 3,000 (5.14 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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