File:Quartzose sandstones (Tunnel City Formation, Upper Cambrian; Natural Bridge State Park, northeast of Leland, Wisconsin, USA) 1.jpg

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English: Quartzose sandstones in the Cambrian of Wisconsin, USA.

Shown above are quartzose sandstones in Natural Bridge State Park, Wisconsin. They are part of the Tunnel City Formation, an Upper Cambrian shallow marine unit. The park's stratigraphy includes four Cambrian units and one Ordovician unit.

Stratigraphy: Tunnel City Formation, Upper Cambrian

Locality: trailside outcrop near Leland Arch, Natural Bridge State Park, northeast of Leland, south-central Sauk County, southern Wisconsin, USA
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Source https://www.flickr.com/photos/47445767@N05/18810904711/
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@N05/18810904711. It was reviewed on 3 December 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

3 December 2020

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current19:55, 3 December 2020Thumbnail for version as of 19:55, 3 December 20204,000 × 3,000 (4.52 MB)Ser Amantio di Nicolao (talk | contribs)Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/18810904711/ with UploadWizard

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