EESA06H3 Lecture Notes - Lecture 9: Grenville Orogeny, Impact Crater, Stratovolcano
24 Apr 2017
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Document Summary
Canada"s geological journey: the last 4 billion years. Canada"s geological history has 5 main parts (crust was added to the continent): arctica (2. 7 ga), ga = billion of years, nena (1. 8 ga), rodina (1. 0 ga), most of the southern part of the ontario and. Canada were added to north america at this time: the above three stages built the craton, which is the canadian shield, it underlies a bit of america and. It is the crust that is added during the process or oreganos: they form the crush zone when the major continents collided. The slave province is near yellowknife and is considered to be the oldest part of north. It contains limbolike pipe, the source rock for diamonds. It comes up from the lower mantle and brings the diamonds up to the surface. The geology of north america has been known for 100 years and plate tectonics put it together: tuzo wilson helped with this theory.
