File:Caririchnium leonardii (dinosaur track) (Dakota Sandstone, Lower Cretaceous; Dinosaur Ridge, Colorado, USA) 18.jpg
Original file (3,008 × 2,000 pixels, file size: 4.34 MB, MIME type: image/jpeg)
Captions
Captions
Summary[edit]
_(Dakota_Sandstone,_Lower_Cretaceous;_Dinosaur_Ridge,_Colorado,_USA)_18.jpg&action=edit§ion=1){kind=link}
| Description |
English: Caririchnium leonardii Lockley, 1987 - iguanodontid dinosaur track in the Cretaceous of Colorado, USA.
Dinosaur Ridge is a section of Colorado's Dakota Hogback, a north-south trending ridge of eastward-dipping, Mesozoic sedimentary rocks. Triassic, Jurassic, and Cretaceous rocks are present, tilted during the Laramide Orogeny in the Cenozoic. This exposure consists of structurally tilted beds of the Dakota Sandstone, a Lower Cretaceous succession of nearshore terrestrial to intertidal to shallow marine quartz sandstone deposits. The eastern side of Dinosaur Ridge has a spectacular sandstone bedding plane with hundreds of dinosaur footprints. Researchers have identified 325 dinosaur footprint at the site, made by about 37 individual dinosaurs. The sediments probably represent a tidal flat that bordered the ancient Western Interior Seaway. The track makers were principally iguanodontid dinosaurs and a small theropod dinosaur. The tracks have been stained gray with charcoal to make them easier to see - the charcoal doesn't harm the tracks. Freeze-thaw weathering is destroying the tracks, and a building over this outcrop has been proposed. This dinosaur tracksite is next to a modern freeway - Interstate 470. As such, the dinosaur tracksite is often called the "Cretaceous 470" or "Dinosaur Freeway". This is part of a series of dinosaur tracksites that occur along the western edge of the Western Interior Seaway and the eastern edge of the Rocky Mountains. Together, they are called the Dinosaur Freeway Megatracksite. The fossil track seen here is the most common type of dinosaur footprints at this locality. This trace fossil has been given the scientific name Caririchnium leonardii. The large tridactyl footprint is the pes (hindfoot) of an iguanodontid (ornithopod) dinosaur. Dinosaur Ridge is the type locality for this particular dinosaur trace fossil. Stratigraphy: Dakota Sandstone, Albian Stage, upper Lower Cretaceous Locality: eastern side of Dinosaur Ridge, between Interstate 70 and the town of Morrison, west of Denver, north-central Colorado, USA |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/52586211744/ |
| Author | James St. John |
Licensing[edit]
_(Dakota_Sandstone,_Lower_Cretaceous;_Dinosaur_Ridge,_Colorado,_USA)_18.jpg&action=edit§ion=2){kind=link}
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
|
This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/52586211744. It was reviewed on 26 December 2022 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 20:39, 26 December 2022 | | 3,008 × 2,000 (4.34 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/52586211744/ with UploadWizard |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
_(Dakota_Sandstone,_Lower_Cretaceous;_Dinosaur_Ridge,_Colorado,_USA)_18.jpg&oldid=848521888){kind=link}