File:Crocodilian footprint (Dakota Sandstone, Lower Cretaceous; Dinosaur Ridge, Colorado, USA) 11.jpg

From Wikimedia Commons, the free media repository
Jump to navigation Jump to search

Original file ‎(3,008 × 2,000 pixels, file size: 4.76 MB, MIME type: image/jpeg)

Captions

Captions

Add a one-line explanation of what this file represents

Summary[edit]

Description
English: Crocodilian footprint in sandstone 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. The sediments probably represent a tidal flat that bordered the ancient Western Interior Seaway.

Fossils here include Caririchnium leonardii (= iguanodontid dinosaur track), Magnoavipes (= theropod or ornithopod dinosaur track), crocodilian tracks, plants (seed pod and tree molds - with possible Teredolites borings), bivalves, and invertebrate trace fossils (Zoophycos, Arenicolites, Diplocraterion, vertical burrows, etc.).

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@N05/52599998030/
Author James St. John

Licensing[edit]

w:en:Creative Commons
attribution
This file is licensed under the Creative Commons Attribution 2.0 Generic license.
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@N05/52599998030. It was reviewed on 1 January 2023 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

1 January 2023

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current22:25, 1 January 2023Thumbnail for version as of 22:25, 1 January 20233,008 × 2,000 (4.76 MB)Ser Amantio di Nicolao (talk | contribs)Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/52599998030/ with UploadWizard

You cannot overwrite this file.

There are no pages that use this file.

Metadata

This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.

Retrieved from "https://commons.wikimedia.org/w/index.php?title=File:Crocodilian_footprint_(Dakota_Sandstone,_Lower_Cretaceous;_Dinosaur_Ridge,_Colorado,_USA)_11.jpg&oldid=871176105"