The New Encyclopædia BritannicaEncyclopædia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 26
... caused when changes are in- duced in rocks by the thermal effect of intrusive igenous rocks ( rocks formed deep within the Earth's crust by cooling molten material ) . Regional metamorphism is caused by a combination of the thermal ...
... caused when changes are in- duced in rocks by the thermal effect of intrusive igenous rocks ( rocks formed deep within the Earth's crust by cooling molten material ) . Regional metamorphism is caused by a combination of the thermal ...
Page 63
... caused hun- dreds of deaths . Extensive depreciation of agricultural land , as well as of wooded areas , may also be caused by slope movements . Major slides result in the complete re- moval or extinction of forest growth ; trees are ...
... caused hun- dreds of deaths . Extensive depreciation of agricultural land , as well as of wooded areas , may also be caused by slope movements . Major slides result in the complete re- moval or extinction of forest growth ; trees are ...
Page 68
... causes of earthquakes is volcanism . Earthquakes are caused not merely by ex- plosions and other eruptive processes , but also by gradual displacements of subterranean volcanic material , or magma . Artificial earthquakes . Artificial ...
... causes of earthquakes is volcanism . Earthquakes are caused not merely by ex- plosions and other eruptive processes , but also by gradual displacements of subterranean volcanic material , or magma . Artificial earthquakes . Artificial ...
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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