File:Exogyra sp. (fossil oyster shell) (Navesink Marl, Upper Cretaceous, ~68 Ma; Wilmington, Delaware, USA) 1.jpg
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[edit]_(Navesink_Marl,_Upper_Cretaceous,_~68_Ma;_Wilmington,_Delaware,_USA)_1.jpg&action=edit§ion=1){kind=link}
| Description |
English: Exogyra sp. - fossil oyster shell from the Cretaceous of Delaware, USA. (OSU 24888, Orton Geology Museum, Ohio State University, Columbus, Ohio, USA)
Some fossil oysters attained rather strange-looking shells when compared with modern forms. A famous example is a Mesozoic-aged, relatively large fossil oyster called Exogyra. The coiling of Exogyra fossil oyster shells is close to the type present in most gastropod shells (snail shells), in which coiling is trochospiral / conispiral - the shell moves outside a plane as it coils. Classification: Animalia, Mollusca, Bivalvia, Pteriomorphia, Pterioida, Ostreida, Gryphaeidae Stratigraphy: Navesink Marl, Maastrichtian Stage, upper Upper Cretaceous, ~68 Ma Locality: unrecorded / undisclosed locality at or near the town of Wilmington, far-northern Delaware, USA Info. at: en.wikipedia.org/wiki/Exogyra |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/53654526946/ |
| Author | James St. John |
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/53654526946. It was reviewed on 15 April 2024 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| current | 03:31, 15 April 2024 | | 2,127 × 1,921 (2.71 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/53654526946/ with UploadWizard |
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