Laurentian

Laurentian

[law-ren-shuhn]
adjective
1.
of or pertaining to the St. Lawrence River.
2.
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

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World English Dictionary
Laurentian (lɔːˈrɛnʃən)
 
adj
1.  Also: Lawrentian of or resembling the style of D. H. Lawrence or T. E. Lawrence
2.  of, relating to, or situated near the St Lawrence River

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Etymonline
Word Origin & History

Laurentian
"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 N.America and Eurasia, 1931, from Ger. (1928), from Laurentia, geologists' name for the ancient core
of N.America + (Eur)asia.
Online Etymology Dictionary, © 2010 Douglas Harper
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