EESA06H3 Lecture Notes - Lecture 10: Thrust Tectonics, Greenstone Belt, Shatter Cone
12 Apr 2016
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Document Summary
Obduction- collision of continents together, crustal thickening, that"s how continents get bigger over time- accreting. Craton= shield - all continents had crystalized rocks in the center that we call shield. Cratonization - process by which continents grow. Province- old crust now embedded into continents, modern term is terranes. Means a large crustal block, far traveled. Fiord- deep valley cut by glaciers and folded by the sea o. Grenville orogeny at 1 billion years ago(1ga) Canadian shield- heartland of canada (also known as carton) Stromatolite- ancient bacterial colony, oxygenation of the earths atmosphere. Ediacaran fauna and the cambrian explosion after 540 ma. Pleistocene- last 2 million years and time of ice ages, also humans. Anthropocene- age of man, modern industrial era 70-15 ad biggining of industrial revolution. Lithporobe- brake up the minirals in the shield, explore it. Ga giga adem, older then 3. 5 billion.
