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Search Results for “Continents, evolution of”
 
 
1) geomorphology. The Columbia Encyclopedia, Sixth Edition. 2001
...Geomorphology developed from the works of James Hutton and James Playfair in the 18th cent.; G. K. Gilbert described landform evolution; William Morris Davis developed...

2) plate tectonics. The Columbia Encyclopedia, Sixth Edition. 2001
...Development of Plate Tectonics TheoryThe beginnings of the theory of plate tectonics date to around 1920, when Alfred Wegener, the German meteorologist and geophysicist,...

3) geology. The Columbia Encyclopedia, Sixth Edition. 2001
...Branches of GeologyGeology is divided into several fields, which can be grouped under the major headings of physical and historical geology. 2 Physical GeologyPhysical...

4) science. The Columbia Encyclopedia, Sixth Edition. 2001
...For many the term science refers to the organized body of knowledge concerning the physical world, both animate and inanimate, but a proper definition would also...

5) Carboniferous period. The Columbia Encyclopedia, Sixth Edition. 2001
...Paleozoic era of geologic time (see Geologic Timescale, tablegeologic timescale, table), from 350 to 290 million years ago. 1 Historical Geology of the PeriodThe...

6) Cretaceous period. The Columbia Encyclopedia, Sixth Edition. 2001
...Mesozoic era of geologic time (see Geologic Timescale, tablegeologic timescale, table), lasting from approximately 144 to 65 million years ago. The Cretaceous was...

7) seafloor spreading. The Columbia Encyclopedia, Sixth Edition. 2001
...First proposed in the early 1960s by the American geologist Harry H. Hess, its major tenets gave great support to the theory of continental drift and provided a conceptual...

8) Permian period. The Columbia Encyclopedia, Sixth Edition. 2001
...Paleozoic era (see Geologic Timescale, tablegeologic timescale, table) from 250 to 290 million years ago. 1 Historical Geology of the Period The Lower PermianDuring...

9) dinosaur. The Columbia Encyclopedia, Sixth Edition. 2001
...The dinosaurs, which were egg-laying animals, ranged in length from 21/2 ft (91 cm) to about 127 ft (39 m). Recognized discoveries of fossilized dinosaur bones date...

10) North America. The Columbia Encyclopedia, Sixth Edition. 2001
...North America, third largest continent (1990 est. pop. 365,000,000), c.9,400,000 sq mi (24,346,000 sq km), the northern of the two continents of the Western Hemisphere....

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