File:Lower Boyle Formation (Middle Devonian; Emmanuel Baptist Church roadcut, Estill County, Kentucky, USA) 1.jpg

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English: The Boyle Formation consists principally of cherty limestones / dolostones (= ~upper two-thirds of the photo). Some chert nodules are cored by visible sponge fossils. Impure dolostones and shale disconformably occur below the cherty carbonate interval (= lower part of the picture). A couple bone beds with placoderm fossils occur in the lower Boyle - the Kiddville Bone Bed and the Beechwood Bone Bed. A shale interval with chertified Ambocoelia brachiopods also occurs in the lower Boyle here.

Stratigraphy: Casey Member & lower Boyle Formation, Givetian Stage, upper Middle Devonian

Locality: eastern end of a 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)

Info. at:

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.
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Source https://www.flickr.com/photos/47445767@N05/52909846070/
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@N05/52909846070. It was reviewed on 23 May 2023 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

23 May 2023

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current21:13, 23 May 2023Thumbnail for version as of 21:13, 23 May 20231,280 × 818 (909 KB)Ser Amantio di Nicolao (talk | contribs)Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/52909846070/ with UploadWizard

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