Laurentiann.
lɔ:'renʃən
中文n. （加拿大东南部）劳伦系；劳伦系岩石层\nadj. 劳伦系的
（加拿大东南部）劳伦系；劳伦系岩石层
adj. 劳伦系的
词根词源
Laurentianin 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.
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