EESA06H3 Lecture 9: Lecture 9
Document Summary
Ca(cid:374)ada"s geologi(cid:272) jou(cid:396)(cid:374)e(cid:455): the last (cid:1008) billio(cid:374) yea(cid:396)s. Ca(cid:374)ada"s geologi(cid:272)al histo(cid:396)(cid:455) is a lo(cid:374)g jou(cid:396)(cid:374)e(cid:455) i(cid:374) (cid:1009) pa(cid:396)ts. Main themes: continents grow through time they expand, north american continent has grown in 5 stages, arctica (2. 7 ga, nena (1. 8 ga, rodinia (1. 0 ga) Key event in southern ontario, because most of the basement that underlies the southern part of the province, the southern part of. Quebec, labrador, texas, some parts of mexico were added to north. Orogeny (appalachian mountains: pangea breakup (<200 ma): british columbia is added during cordilleran. Orogeny (e. g. rockies: 4 added much of eastern canada, maritime canada, the atlantic provinces. Most of the crust that underlies those was added during pangaea assembly: 5 added cordillera; the whole of british columbia, the whole of the yukon, alaska much of california has been added on to north america quite recently. Orogen the (cid:396)o(cid:272)ks; the (cid:272)(cid:396)ust that (cid:449)as added a(cid:374)d usuall(cid:455) it"s highl(cid:455) defo(cid:396)(cid:373)ed.
