chemung period

1 definition found

chemung period - Collaborative International Dictionary of English v.0.48 :

  Chemung period \Che*mung" pe"ri*od\, (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.
     [1913 Webster]