Laurentian

[law-ren-shuh n] /lɔˈrɛn ʃən/

adjective

of or pertaining to the St. Lawrence River.

Geology. noting or pertaining to the granite intrusions and orogeny in Canada around the Great Lakes during Archeozoic time.

Origin

1860-65; < Late Latin Laurenti(us) Lawrence (orig. adj., equivalent to Laurent(ēs) men of Laurentum + -ius -ious) + -an

British Dictionary definitions for Laurentian

Laurentian

/lɔːˈrɛnʃən/

adjective

Also Lawrentian. of or resembling the style of D. H. Lawrence or T. E. Lawrence

of, relating to, or situated near the St Lawrence River

Word Origin and History for Laurentian

in reference to granite strata in eastern Canada, 1863, named for the Laurentian Mountains, where it is found, which are named for the nearby St. Lawrence River. Hence, Laurasia, Paleozoic supercontinent comprising North America and Eurasia, 1931, from German (1928), from Laurentia, geologists' name for the ancient core of North America + (Eur)asia.