Genesee epoch : The closing subdivision of the Hamilton period in the American Devonian system; -- so called because the formations of this period crop out in Genesee, New York.

Example:


Taxonomy
Genesee Epoch, subdivision, the American, Devonian system, crop, the Hamilton, Hamilton period, Genesee, New York, Definitions, Quotes, Quote of the Day.

Defination from the web:
Genesee Epoch. Genesee epoch. The closing subdivision of the Hamilton period in the American Devonian system; -- so called because the formations of this period crop out in Genesee, New York. ...