File:Fossil wood (Morrison Formation, Upper Jurassic; Escalante Petrified Forest State Park, Utah, USA) 11.jpg
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Summary
| Description |
English: Fossil wood in the Jurassic of Utah, USA.
This fossil tree trunk is in the Morrison Formation, an Upper Jurassic succession that is widely distributed in many western American states. The Morrison consists of fluvial (river/floodplain) and lacustrine (lake) deposits, plus reddish-colored paleosol horizons. Dinosaur bones and dinosaur tracks are moderately common in Morrison Formation sediments. Exceptionally dinosaur-rich localities include Como Bluff in Wyoming, Dinosaur National Monument in Utah, Dinosaur Ridge in Colorado, and the Cleveland-Lloyd Quarry in Utah. This type of fossil wood is usually referred to as "petrified wood". It's a preservation style actually called "permineralization" - the small-scale porosity of buried wood or bone gets filled with minerals as groundwater percolates through. The most common permineralization mineral is quartz (SiO2). Cellular-level details can be preserved in permineralized wood, but some examples have little original botanical structure remaining. Stratigraphy: Brushy Basin Member, Morrison Formation, Upper Jurassic Locality: trailside, Escalante Petrified Forest State Park, Utah, USA |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/50153081451/ |
| 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@N05/50153081451. It was reviewed on 1 November 2022 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 | 21:10, 1 November 2022 | | 3,008 × 2,000 (5.79 MB) | Ser Amantio di Nicolao | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/50153081451/ with UploadWizard |
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