This Dynamic Earth: The Story of Plate Tectonics

Front Cover
DIANE Publishing, 1996 - Science - 77 pages
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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big daddy shrek did not likes this he only likes to devor men and women

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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.  

Contents

I
ii
II
14
III
31
IV
47
V
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VI
59

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Page 10 - One heard time and again that he had been turned down for a certain chair because he was interested also, and perhaps to a greater degree, in matters that lay outside its terms of reference...
Page 46 - I'he three most commonly used space-geodetic techniques — very long baseline interferometry (VLBI), satellite laser ranging (SLR), and the Global Positioning System (GPS) — are based on technologies developed for military and aerospace research, notably radio astronomy and satellite tracking.
Page 5 - He reasoned that it was physically impossible for most of these organisms to have swum or have been transported across the vast oceans. To him, the presence of identical fossil species along the coastal parts of Africa and South America was the most compelling evidence that the two continents were once joined. In Wegener's mind, the drifting of continents after the break-up of Pangaea explained not only the matching fossil occurrences but also the evidence of dramatic climate changes on some continents....
Page 15 - In the 1950s, oceanic exploration greatly (60) expanded again. Data gathered by oceanographic surveys conducted by many nations led to the discovery that a great mountain range on the ocean floor virtually encircled the entire Earth. Called the global (65) midocean ridge, this immense submarine mountain chain — more than 50,000 kilometers (km) long and, in places, more than 800 km across — zigzags between the continents, winding its way around the (70) globe like the seam on a baseball. Rising...
Page 8 - Cynognathus, a Triassic land reptile approximately 3 m long. Fossil remains of the freshwater reptile Mesosaurus.
Page i - PERMIAN - 225 million years ago TRIASSIC - 200 million years ago JURASSIC - 135 million years ago CRETACEOUS - 65 million years ago...
Page 50 - EXPLANATION Divergent plate boundaries — Where new crust is generated as the plates pull away from each other. Convergent plate boundaries — Where crust is consumed in the Earth's interior as one plate dives under another. Transform plate boundaries — Where crust is neither produced nor destroyed as plates slide horizontally past each other. Plate boundary zones — Broad belts in which deformation is diffuse and boundaries are not well defined. Selected prominent hotspots World map showing...
Page 39 - Continental-continental convergence The Himalayan mountain range dramatically demonstrates one of the most visible and spectacular consequences of plate tectonics. When two continents meet head-on, neither is subducted because the continental rocks are relatively light and, like two colliding icebergs, resist downward motion. Instead, the crust tends to buckle and be pushed upward or sideways.
Page 31 - Transform margin: also called conservative margin, there, crust is neither produced nor destroyed as the plates slide horizontally past each other.
Page 72 - ... occurring for hundreds of years so livelihood and security are taken for granted. • geothermal energy • mineral ore deposits associated with volcanic minerals eg tin, silver and gold • tourism - volcanoes attract people because they are dangerous and beautiful. Many of the metallic minerals mined such as copper, gold, silver, lead, and zinc, are associated with magmas found deep within the roots of extinct volcanoes located above subduction zones.

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