Found 1 items, similar to Laurentian period.
English → English (gcide) Definition: Laurentian period Laurentian \Lau*ren"tian\, a. Pertaining to, or near, the St. Lawrence River; as, the Laurentian hills. [1913 Webster] Laurentian period (Geol.), the lower of the two divisions of the Arch[ae]an age; -- called also the Laurentian. [1913 Webster]