English: Weathered shales in the Devonian of Kentucky, USA.

The upper part of the picture shows relatively hard, dark-colored, jointed shales of the lower Trousdale Member, which is part of an offshore marine succession near the base of the Middle to Upper Devonian New Albany Shale / Ohio Shale / Chattanooga Shale.

The middle and lower parts of the picture show the upper Portwood Member of the New Albany Shale. The banded intervals are the "striped" unit at the top of the Portwood Member - unit e of Schieber & Lazar (2004, p. 46). The striped beds consist of alternating dark-colored shales and light-colored "dolomitic mudstone" beds [I'm not sure if that means dolomudstones or dolomitic mudrocks, which are different lithologies].

Stratigraphy: lower Trousdale Member (also known as the Blocher Member) over the upper Portwood Member, lower New Albany Shale / Ohio Shale / Chattanooga Shale, Givetian Stage, upper Middle Devonian

Locality: roadcut on the northern side of Route 52, across the road from Emmanuel Baptist Church (now Grayson Funeral Home), ~3.5 miles east of Estill County line, ~6 miles west of Irvine, western Estill County, east-central Kentucky, USA (37˚ 42’ 11.12" North latitude, 84˚ 02’ 01.25" West longitude)

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Reference cited:

Schieber, J. & R. Lazar (eds.). 2004. Devonian black shales of the eastern U.S. New insights into sedimentology and stratigraphy from the subsurface and outcrops in the Illinois and Appalachian Basins. Field Guide for the 2004 Annual Field Conference of the Great Lakes Section of SEPM. Indiana Geological Survey Open-File Study 04-05. 90 pp.