Photomicrographs of local limestone samples below showing fossil fragments ... Due to the abundance of life in the Ordovician ocean, southwestern Ohio is one of the best Ordovician fossil collecting ...

The tombstone (which dates back to 1627) is actually black limestone, and likely comes from Belgium. All of this was discovered thanks to tiny fossils and an English knight living in Jamestown. Oh, ...

Southwestern Ohio's limestone (a sedimentary rock ... Although local shales typically contain fewer fossils than the fossil-rich limestone with which they are interlayered, they nevertheless preserve ...