Laurentian period
(Geol.) | the lower of the two divisions of the Archæan age; - called also the Laurentian. |
See also: Laurentian
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
(Geol.) | the lower of the two divisions of the Archæan age; - called also the Laurentian. |
See also: Laurentian