By: magic-gigapans
Image: Callan Bentley, Mid-Atlantic Geo-Image Collection
License: Creative Commons Non Commercial ⧉

Uploaded: 25 Mar 2020
Last Updated: 27 May 2020

899 megapixels
43,292 x 20,769 pixels
144.3 in X 69.2 in at 300dpi
6,804 pixels per inch

This specimen is Kope Formation, probably from the Alexandria Submember and from northern Kentucky just outside Maysville, along the AA Highway. It contains Cryptolithus sp. and Flexicalymene sp. trilobite bits, the trilobite Isotelus maximus (state invertebrate fossil of Ohio, as well as abundant bryozoans and brachiopods. These fossil grainstones (Dunham), or poorly-washed biosparite/biomicrite (Folk) are interpreted as time-condensed, storm-winnowed deposits that were likely above storm wave base but at or below fair-weather wave base. Regardless, limestones such as these are interpreted as having been deposited more proximally to the Ordovician shoreline than the intervening mudstones.