Laurentian
adjective
- of or relating to the St. Lawrence River
- designating or of a series of rocks of the Precambrian system in E Canada
See Laurentian in American Heritage Dictionary 4
(lô-rĕnˈshən)
adjective- Of, relating to, or being in the vicinity of the St. Lawrence River.
- Geology Of or relating to the Precambrian gneissic granite of the Lake Superior area.
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