Outcrops occur along Four Mile Creek in Prebble County, Ohio and in Union County Indiana. Color is typically a chalky white semi-vitreous stone with many diry gray and gray-yellow inclusions including fossils.With weathering, the chert typically is banded with parallel stripes and swrils of colors where blues and grays are the most typical. There can be translucent inclusions of fragmented fossils. With a fresh break, this chert can be opaque to translucent. Heat treatment improves luster, and brings out the reds and pinks. All cultures use this material, but it is rare to find it outside west central Ohio.
Prehistoric Chert Types of the Midwest, T. DeRegnaucourt and J. Georgiady, 68; and Converse Robert, Ohio Flint Types, 1994.