Proper noun
(geology) The craton that forms the geological core of North America, and that was a separate continent in the past (before merging into Laurasia).
(nonstandard) Canada.
Source: en.wiktionary.orgLaurentia is an ancient craton which forms the geologic core of North America; it formed between 1.5 and 1.0 billion years ago during the Proterozoic eon. citation The Canadian Shield is the largest exposure of this craton. Source: Internet
During this time, there are four continents: Gondwana (Africa, South America, Australia, Antarctica, India), Laurentia (North America with parts of Europe), Baltica (the rest of Europe), and Siberia (Northern Asia). Source: Internet
He left two other daughters: the legitimate Agnes (died 1187) and the illegitimate Laurentia, who married Count Bernard III of Comminges. Source: Internet
The Canadian Shield is U-shaped and is a subsection of the Laurentia craton signifying the area of greatest glacial impact (scraping down to bare rock) creating the thin soils. Source: Internet
Finally, and very soon afterwards, Laurasia itself split up again, into Laurentia (North America) and the Eurasian continent. Source: Internet
However, Baltica (Northern Europe and Russia) and Laurentia (eastern North America and Greenland) remained in the tropical zone, while China and Australia lay in waters which were at least temperate. Source: Internet