This Dynamic Earth: The Story of Plate Tectonics
Provides a brief introduction to the concept of plate tectonics. Highlights some of the people and discoveries that have advanced the development of the theory and traces its progress since its proposal. Fully illustrated with extraordinary color photos and maps. Chapters: historical perspective; developing the theory (ocean floor mapping, magnetic stripping and polar reversals, magnetic stripes and isotopic clocks); understanding plate motions; "Hotspots": mantle thermal plumes; some unanswered questions; plate tectonics and people. References.
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This brilliant FREE ebook is available for download from http://pubs.usgs.gov/gip/dynamic/dynamic.pdf
It is also available online at http://pubs.usgs.gov/gip/dynamic/dynamic.html as teaching material for schools or home use. If you live somewhere that has lots of earthquakes, I suggest that you do some reading, as it will give you an understanding of the structure of our planet and may put your mind at ease.