File:Brachiopods in fossiliferous limestone (Jeffersonville Limestone, Middle Devonian; Falls of the Ohio, southern Indiana, USA) 1 (33310529702).jpg

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Exceedingly fossiliferous rocks of the Jeffersonville Limestone are well exposed at the famous Falls of the Ohio outcrop (Indiana side of the Ohio River at Louisville). These Middle Devonian rocks have abundant colonial and solitary corals (tabulates and rugosans), plus other typical Paleozoic shallow carbonate seafloor invertebrates (e.g., brachiopods, bryozoans, crinoids). The shells and skeletons in portions of the Jeffersonville Limestone have been silicified (replaced by quartz/silica - SiO2). The silicified fossils are more resistant to weathering than the limestone host rock. Upon weathering and erosion, the fossils stand out in relief, or are weathered completely free of matrix.

Stratigraphy: Jeffersonville Limestone, lower Middle Devonian

Locality: northern shore of the Ohio River, across from the city of Louisville, west of the Falls of the Ohio rapids, southern margin of Clark County, southern Indiana, USA (vicinity of 38° 16' 42.32" North, 85° 45' 57.79" West)
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Source Brachiopods in fossiliferous limestone (Jeffersonville Limestone, Middle Devonian; Falls of the Ohio, southern Indiana, USA) 1
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@N05/33310529702 (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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Date/TimeThumbnailDimensionsUserComment
current18:59, 7 December 2019Thumbnail for version as of 18:59, 7 December 20193,589 × 2,993 (5.38 MB)Ser Amantio di Nicolao (talk | contribs)Transferred from Flickr via #flickr2commons

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