文档介绍：Understanding Earth Fifth Edition Chapter 10: EVOLUTION OF THE CONTINENTS Copyright © 2007 by W. H. Freeman pany Grotzinger • Jordan • Press • Siever Chapter 10 Evolution of the Continents (大陸的演化) About Evolution of the Continents Nearly two-thirds of the Earth’s surface – all of the oceanic crust – was formed over the past 200 million years.(所有的海洋地殼於過去的2億年中形成) However, rocks of the continents are much older, as old as 4 billion years. (但是在大陸上的岩石年齡最老的可到40億年) Studying the continents tells us how the continental lithosphere formed and evolved. (研究大陸可以了解大陸岩石圈形成的及演化的過程) Lecture Outline The tectonics of North America (北美洲的板塊運動) 2. Tectonic provinces around the world (全球造構區) 3. How continents grow (大陸如何增長) 4. How continents are modified (大陸如何改變) 5. Formation of cratons (古陸的形成) 6. Deep structure of the continents (大陸的深部構造) The tectonics of North America (北美洲的板塊運動) ● The stable interior (穩定的內陸) ● Canadian shield (加拿大地盾) ● interior platform (內陸地臺) ● basins and uplifts (盆地與抬升) Canadian Shield The tectonics of North America ● The Appalachian fold belt (阿帕拉契摺皺帶) ● Valley and ridge province (谷嶺區) ● Blue Ridge province (藍嶺區) ● Piedmont (山麓) ● Coastal Plain (海岸平原)