File:Fossil redwood tree trunk (probably Metasequoia) (Sepulcher Formation, Eocene; "Petrified Tree", Yellowstone National Park, Wyoming, USA) 1 (13460816034).jpg

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Fossil redwood tree trunk in the Eocene of Wyoming, USA.

This is a scarce example of a still-standing, Eocene-aged fossil tree in Yellowstone Park, Wyoming. The tree itself is a redwood, probably belonging to the genus Metasequoia. Redwoods do not live in Yellowstone today, so the climate has clearly changed since the Eocene.

The fossil wood has been permineralized. "Perminerlization" is the proper term for what most people called "petrified wood". Permineralization involves the precipitation of minerals (usually quartz - SiO2) in the porosity of wood or bone by groundwater that has percolated through. The original microscopic-level anatomy of wood can be preserved in a permineralized fossil. Sometimes mineralization can completely obscure the biologic structure of fossil wood - some paleontologists refer to that as quartz replacement, but it's just extreme permineralization.

Classification: Plantae, Pinophyta, Pinopsida, Pinales, Cupressaceae

Stratigraphy: Sepulcher Formation, Washburn Group, lower Absaroka Volcanics Supergroup, Eocene

Locality: "Petrified Tree", northern Yellowstone National Park, nw Wyoming, USA
Date
Source Fossil redwood tree trunk (probably Metasequoia) (Sepulcher Formation, Eocene; "Petrified Tree", Yellowstone National Park, Wyoming, USA) 1
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@N05/13460816034 (archive). It was reviewed on 6 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

6 December 2019

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Date/TimeThumbnailDimensionsUserComment
current01:57, 6 December 2019Thumbnail for version as of 01:57, 6 December 20194,288 × 2,848 (6.14 MB)Ser Amantio di Nicolao (talk | contribs)Transferred from Flickr via #flickr2commons

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