lecture 13 - Exam Thursday. The fact that the earths plates...

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Exam Thursday. . The fact that the earth’s plates continue to move is interesting since other things in the universe have been changing. 2 nd order relief features: oceans Young basalt (<60 m.y.) covers sea floor. Mid-oceanic ridge: major axial rift; 40,000 mi long; trenches in the center of the ridge suggest crustal spreading. Ocean basin Floor: average depth of 17,000 ft. Abyssal plains: very smooth, flat areas of sea floor covered with fine sediment. It covers a big part of the earth. Diagram showing ridges and trenches. Area below the Indian Ocean, near Japan (the original people to experience and name it), experience what is known as a tsunami. It is a shockwave which then moves and creates a huge wave that can potentially cause great destruction. It’s an underwater earthquake. Passive continental margins: belongs to the continent but it has certain features: It is known as a narrow zone where oceanic lithosphere contacts continental lithosphere; includes the shelf, slope, and rise. This is getting closer to the land area that we’re on.
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This note was uploaded on 09/05/2011 for the course ENVIRONMEN 0000 taught by Professor Faculty during the Spring '11 term at Rutgers.

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lecture 13 - Exam Thursday. The fact that the earths plates...

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