EESA06H3 Lecture Notes - Lecture 10: The Maritimes, Canadian Shield, Rodinia
Document Summary
Canada"s geologic journey: the last 4 billion years. India colliding with asia: north american continent shows 5 growth stages, arctica (2. 7 ga) oldest, ga means billions of years, columbia (1. 8 ga, rodinia (1. 0 ga) really important because life evolves at this time. arctica + columbia + rodinia = canadian. Shield which is very old and hard rock, later softer sedimentary rocks were added on eastern and western canada: a + b + c = canadian shield (the craton the core of north. Appalachians orogeny (appalachian mountains: pangea breakup (<200 ma): british columbia is added during. Because it has been metamorphose so there must have been a pre-existing rock. And if we look at the zircons in here they are what we call detritals means they are secondary and they have been eroded from something else and are old, garbage, they have been derived from something else. Pangea: 5 - the cordilleran orogeny added after the break up of.
