File:Chert in limestone (Fort Payne Formation, Lower Mississippian; Rt. 61 roadcut, north of Burkesville, Kentucky, USA) 2 (42418583061).jpg

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Chert in limestone in the Mississippian of Kentucky, USA.

This rock is in the Fort Payne Formation of southern Kentucky. The Fort Payne is a richly fossiliferous limestone-and-shale succession that is dominated by crinoids. The grayish-colored material in the photo is chert, a cryptocrystalline, quartzose sedimentary rock. It is secondary - the original rock was fossiliferous limestone, but was partially replaced by quartz in the form of chert.

Stratigraphy: Fort Payne Formation, Osagean Stage/Series, upper Lower Mississippian

Locality: Burkesville North Outcrop - Route 61 roadcut at milepost 23, way north of Burkesville, Kentucky, USA. (36° 54’ 08.08” North latitude, 85° 25’ 56.19” West longitude)
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Source Chert in limestone (Fort Payne Formation, Lower Mississippian; Rt. 61 roadcut, north of Burkesville, Kentucky, USA) 2
Author James St. John

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This file is licensed under the Creative Commons Attribution 2.0 Generic license.
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/42418583061 (archive). It was reviewed on 12 October 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

12 October 2019

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Date/TimeThumbnailDimensionsUserComment
current04:06, 12 October 2019Thumbnail for version as of 04:06, 12 October 20194,000 × 3,000 (5.83 MB)Ser Amantio di Nicolao (talk | contribs)Transferred from Flickr via #flickr2commons

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