Other
Scientific paper
Jul 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986sciam.255...70m&link_type=abstract
Scientific American (ISSN 0036-8733), vol. 255, July 1986, p. 70-79.
Other
2
Earth Planetary Structure, Mountains, Orography, Andes Mountains (South America), Earth Crust, Earth Mantle, Geodynamics, Gravimetry, Himalayas, Lithosphere, Plates (Tectonics), Tibet
Scientific paper
The underlying structure - the tectonics - of mountain ranges is described. The question of what holds mountain ranges up is examined. Some ranges stand on plates of strong rock; others are buoyed by crustal roots reaching deep into the mantle. The latter may collapse if their flanks are not buttressed horizontally. The Tibetan plateau and the Andes are areas that may be undergoing such a collapse. The forces that create mountain ranges and support them are also considered with respect to the Alps, Himalayas and Rockies. The work of such pioneers as George Everest, J. H. Pratt and Britain's Astronomer Royal George B. Airy, leading to the first advances in understanding of the structure of mountains, is considered.
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