Chemung period
Che`mung´ pe´ri`od
| 1. | (Geol.) A subdivision in the upper part of the Devonian system in America, so named from the Chemung River, along which the rocks are well developed. It includes the Portage and Chemung groups or epochs. See the Diagram under Geology. |
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.