File:Interbedded shale and limestone (upper Cave Branch Member, Slade Formation, Upper Mississippian; Clack Mountain Road Outcrop, south of Morehead, Kentucky, USA) 1 (32504591638).jpg

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Interbedded shale and limestone in the Mississippian of Kentucky, USA.

This outcrop in Kentucky is in the Upper Mississippian Slade Formation. The unit was formerly known as the Newman Limestone ("They always change the names to protect the innocent!"). Slade Formation limestones are shallow ocean deposits.

Seen here is the upper Cave Branch Member - it's a gray shale-rich interval with interbedded thin, fine-grained limestones deposited in an ancient intertidal environment.

From Ettensohn & Lierman (1992): [The] overlying parts of the Cave Branch Member here include dark-gray shales and interbedded calcilutites, which contain laminae, flaser-beds, mudcracks, runzelmarken, as well as vertical and horizontal burrows. This part of the Cave Branch represents a transgressive tidal mud-flat deposit on the leading edge of an early to middle Chesterian transgressing sea represented by the upper Cave Branch-through-Maddox Branch members of the Slade, all of which are exposed here. The dark-gray shales in tidal parts of the Cave Branch probably represent reworked soils from the underlying [paleosol] deposit.

Stratigraphy: upper Cave Branch Member, Slade Formation, Upper Mississippian

Locality: roadcut next to the Clack Mountain Road-Route 519 intersection, south of Morehead, Kentucky, USA (vicinity of 38° 07’ 41.87” North latitude, 83° 24’ 47.04” West longitude)
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Source Interbedded shale and limestone (upper Cave Branch Member, Slade Formation, Upper Mississippian; Clack Mountain Road Outcrop, south of Morehead, Kentucky, 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@N05/32504591638 (archive). It was reviewed on 7 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

7 December 2019

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current18:33, 7 December 2019Thumbnail for version as of 18:33, 7 December 20193,000 × 4,000 (6.39 MB)Ser Amantio di Nicolao (talk | contribs)Transferred from Flickr via #flickr2commons

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