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This period was around 320 millions years ago. It was a giant swamp. Plant life in that period was dominated by Lepidosandron, which is a scaly barked tree. These later gave us coal after millions of year under the ground. -
Oldest exposed rocks are in the Cincinnati Area. It is one of the most famous places in the world in terms of abundance and quality of fossils. These rocks are about 450 million years old, from the Ordovician Period. -
In the late 1800s, Ohio geologists started to identify rock layers in the southeastern part of Ohio, which they saw that it is different when compare to the on from the underlying Pennsylvanian formations. These layers were later discovered that they were formed in the Early Permian Period (about 299–251 million years ago). -
It is an animals specie which lived during the late Devonian Period, which is around 360 millions years ago. It was one of the largest armored prehistoric fish.
Dunkleosteus was described by John Strong Newberry in 1873, which its old name was Dinichthys terrelli
-Fossils of Dunkleosteus are one of the most iconic items at the Cleveland Museum of Natural History. -
Edward Orton was the first president of The Ohio State University. he was also the State geologist of Ohio.
Orton Hall was built and named in his honor. -
The salt beds were formed during the Silurian Period, roughly 443 to 419 million years ago. Human discover Silurian Period in Ohio by looking at salt bed, which is in Cleveland areas. It was first covered in a warm and shallow ocean, mostly depositing limestones and dolostones. Towards the end of the Silurian seawater began to evaporate, forming massive salt beds. -
Orton Hall was Designed by Packard Yost. It is the ONLY building in the world that is known for the design which to reflect geologic time. The building was also constructed of Ohio building stone. Chimes in the bell tower are a reminder of the passing time.