Southwestern Ohio's limestone (a sedimentary rock ... whether you're interested in collecting Late Ordovician fossils, exploring glacier-carved landscapes, or observing streams as they shape the ...

Due to the abundance of life in the Ordovician ocean, southwestern Ohio is one of the best Ordovician fossil collecting sites in the world. The great number of fossils shows the nature of life in ...

A new species of fossil from 444 million years ago that has perfectly preserved insides has been affectionately named "Sue" ...

3 min read During the Ordovician period ... known mainly from the tiny fossil teeth they left behind. The few complete fossils that have been found suggest they were finned, eel-like creatures ...

The earliest fossil evidence for sharks or their ancestors are a few scales dating to 450 million years ago, during the Late Ordovician Period. “Shark-like scales from the Late Ordovician have been ...

potentially [the fossils] provide a sort of intermediate between the Cambrian record and the later Ordovician records.” Plants that live on land are thought to have ...