File:Stromatolitic limestone (Big Horse Limestone Member, Orr Formation, Middle Cambrian; Orr Ridge, House Range, Utah, USA) 1 (45028778714).jpg
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| Description |
Stromatolitic limestones in the Cambrian of Utah, USA. (cross-section view; geology hammer for scale) Stromatolites (e.g., see right above the yellow paint stripe on the outcrop - click on the photo to zoom in) 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). Stratigraphy: Big Horse Limestone Member, Orr Formation, upper Marjuman Stage; almost uppermost Middle Cambrian Locality: ridge crest of Orr Ridge, eastern flanks of the House Range, Millard County, western Utah, USA (vicinity of 39˚ 11' 56.37" North latitude, 113˚ 18' 47.91" West longitude) |
| Date | |
| Source | Stromatolitic limestone (Big Horse Limestone Member, Orr Formation, Middle Cambrian; Orr Ridge, House Range, 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@N05/45028778714 (archive). It was reviewed on 7 November 2018 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
James St. John
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 00:33, 7 November 2018 | | 1,797 × 1,198 (2.98 MB) | Lu Brito (talk | contribs) | Transferred from Flickr via #flickr2commons |
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