Source : Webster's Revised Unabridged Dictionary (1913)

Champlain period \Cham*plain" pe"ri*od\ (Geol.)
   A subdivision of the Quaternary age immediately following the
   Glacial period; -- so named from beds near Lake Champlain.

   Note: The earlier deposits of this period are diluvial in
         character, as if formed in connection with floods
         attending the melting of the glaciers, while the later
         deposits are of finer material in more quiet waters, as
         the alluvium.