EESA06H3 Lecture 10: Lecture 10
Document Summary
Political unification of the provinces 1867 to 1949. k: tuzo wilson came up with the idea of plate tectonics. Approximately every 500million years, continent aggregate into super continents. Wilson cycle: continent, new rifting mor, seafloor spreading mor, subduction initiation, ocean closing, collision, orogeny, new rifting. Little islands get incorporated into large continents and continents grow. Terrane: a block of crust that will eventually collide with a land mass, e. g. japan. It is different than the rest of the continent. Na is divided into 5 main pieces: the original na continent, arctica, which started to form about 2. 5 billion years ago from smaller continents and was completed by about 1. 9 million years ago when old. Archean cratons (e. g. slave, nain provinces ) were welded together by the trans-hudson. S area 1 is the canadian shield that extends down to the states and also up into. S oldest rocks found on earth in slave province from about 4 billion years ago.
