File:Tyrannosauripus pillmorei theropod dinosaur footprint (Raton Formation, Upper Cretaceous; Philmont Ranch tracksite, North Ponil Canyon, northern New Mexico, USA) (15352953647).jpg
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Tyrannosauripus pillmorei Lockley & Hunt, 1994 theropod dinosaur footprint from the Cretaceous of New Mexico, USA (public display, University of Wyoming Geological Museum, Laramie, Wyoming, USA). This 86 by 64 centimeter-sized dinosaur footprint was made by the famous theropod dinosaur Tyrannosaurus rex. Based on the spacing of individual prints at this locality, each step made by the dinosaur was almost 3 meters in length (over 9 feet). The small, slender structure at the lower right is an impression of the hallux toe, which is homologous with the big toe in humans. Stratigraphy: Raton Formation, Maastrichtian Stage, upper Upper Cretaceous Locality: Philmont Ranch tracksite, North Ponil Canyon, northern New Mexico, USA Trace fossils are any indirect evidence of ancient life. They refer to features in rocks that do not represent parts of the body of a once-living organism. Traces include footprints, tracks, trails, burrows, borings, and bitemarks. Body fossils provide information about the morphology of ancient organisms, while trace fossils provide information about the behavior of ancient life forms. Interpreting trace fossils and determination of the identity of a trace maker can be straightforward (for example, a dinosaur footprint represents walking behavior) or not. Sediments that have trace fossils are said to be bioturbated. Burrowed textures in sedimentary rocks are referred to as bioturbation. Trace fossils have scientific names assigned to them, in the same style & manner as living organisms or body fossils. |
| Date | |
| Source | Tyrannosauripus pillmorei theropod dinosaur footprint (Raton Formation, Upper Cretaceous; Philmont Ranch tracksite, North Ponil Canyon, northern New Mexico, USA) |
| 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@N05/15352953647. It was reviewed on 1 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 | 09:07, 1 December 2019 | | 1,776 × 2,144 (1.14 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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