File:Grypania spiralis (Greyson Shale, Mesoproterozoic, 1454-1468 Ma; western flanks of the Big Belt Mountains, Montana, USA) 1.jpg
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English: Grypania spiralis Walter et al., 1976 - fossil eucaryote ribbon in gray shale from the Precambrian of Montana, USA.
The oldest known fossils on Earth are 3.5 billion year old stromatolites and microbial cells. The oldest known macroscopic body fossils include Grypania spiralis, which consist of spirally coiled ribbons. The oldest examples are from the Paleoproterozoic-aged Negaunee Iron-Formation in Michigan's Upper Peninsula. The example seen here is from the Mesoproterozoic of Montana. What does Grypania represent? The safest identification is that they are eucaryotes (Domain Eucaryota). In a generalized way, they are often simply referred to as fossil algae. Stratigraphy: Greyson Shale, Little Belt Group, Belt Supergroup, lower Mesoproterozoic, 1454-1468 Ma Locality: roadcut along the eastern side of North Fork Road, ~100 meters north of Route 12, just west of the mouth of Deep Creek Canyon, western flanks of the Big Belt Mountains, east-central Broadwater County, western Montana, USA (46° 19’ 33.22” North latitude, 111° 17’ 00.62” West longitude) |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/50954522421/ |
| 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@N05/50954522421. It was reviewed on 19 February 2021 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| current | 21:46, 19 February 2021 | | 2,942 × 1,944 (4.37 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/50954522421/ with UploadWizard |
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