The New Encyclopędia BritannicaEncyclopędia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 36
... regions B and C ( upper mantle ) region A ( crust ) D ' region D ( lower mantle ) region E ( outer core ) , region G ( inner core ) 15 900 2,700 2,900 5,000 5,150 6,371 depth ( kilometres ) region F ( transition region ) mantle - core ...
... regions B and C ( upper mantle ) region A ( crust ) D ' region D ( lower mantle ) region E ( outer core ) , region G ( inner core ) 15 900 2,700 2,900 5,000 5,150 6,371 depth ( kilometres ) region F ( transition region ) mantle - core ...
Page 39
... region D " , which occupies the lowest 200 kilometres ( 100 miles ) of the mantle , is an abnormal region in which the seismic velocity gradients ( rates of change of velocity with depth ) da / dz and dß / dz 12 become zero or negative ...
... region D " , which occupies the lowest 200 kilometres ( 100 miles ) of the mantle , is an abnormal region in which the seismic velocity gradients ( rates of change of velocity with depth ) da / dz and dß / dz 12 become zero or negative ...
Page 288
... region , 46 percent in the coastal region , and 2 percent in the eastern region ( the remainder in the Galįpagos ) . The annual birthrate is 45 per 1,000 inhabitants , and the infant mortality rate is 86 per 1,000 . The annual ...
... region , 46 percent in the coastal region , and 2 percent in the eastern region ( the remainder in the Galįpagos ) . The annual birthrate is 45 per 1,000 inhabitants , and the infant mortality rate is 86 per 1,000 . The annual ...
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activity Africa agriculture America became become body called capital caused central centre century changes Christian Church continued core countries cultural demand direction early Earth East Eastern eclipse economic effect established Europe example feet field Figure flow force groups growth important income increase industry internal investment Italy kilometres known labour Lake land later less living magnetic major mantle material means measurements ment metres miles mountains move movement nature North observed occur ocean organization origin Orthodox patriarch percent period planning Pleistocene political population position possible present problems production region relatively remained result rise River rocks social society South species structure surface theory tion trade traditional United West Western