File:Lacustrine stromatolite (Green River Formation, Eocene; White Hill, near Ephraim, Utah, USA) 1 (45498267014).jpg

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Lacustrine stromatolite from the Eocene of Utah, USA. (cut & polished cross-section)

Stromatolites are layered structures built up by mats of cyanobacteria (= blue-green bacteria, often incorrectly called “blue-green algae”). Stromatolites are fairly common in portions of the shallow-water marine & nonmarine fossil record, but they also occur in a few modern localities (e.g., Shark Bay along coastal Western Australia).

The example shown here grew during the Eocene in an ancient lake in Utah.

Stratigraphy: Green River Formation, Eocene

Locality: White Hill, near the town of Ephraim, central Utah, USA

See info. at:

<a href="https://en.wikipedia.org/wiki/Stromatolite" rel="noreferrer nofollow">en.wikipedia.org/wiki/Stromatolite</a>
Date
Source Lacustrine stromatolite (Green River Formation, Eocene; White Hill, near Ephraim, Utah, 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@N05/45498267014 (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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current02:04, 6 December 2019Thumbnail for version as of 02:04, 6 December 20193,449 × 1,919 (3.13 MB)Ser Amantio di Nicolao (talk | contribs)Transferred from Flickr via #flickr2commons

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