medina epoch

1 definition found

medina epoch - Collaborative International Dictionary of English v.0.48 :

  Medina epoch \Me*di"na ep"och\ [From Medina in New York.]
     (Geol.)
     A subdivision of the Niagara period in the American upper
     Silurian, characterized by the formations known as the Oneida
     conglomerate, and the Medina sandstone. See the Chart of
     Geology.
     [1913 Webster]