The New Encyclopędia BritannicaEncyclopędia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 12
... rocks in the Superior and Slave provinces record major development of granite about 2,500,000,000 years ago . Antedating the granite , and largely engulfed by it are thick , tightly folded beds of basaltic lava , volcanic ash , banded ...
... rocks in the Superior and Slave provinces record major development of granite about 2,500,000,000 years ago . Antedating the granite , and largely engulfed by it are thick , tightly folded beds of basaltic lava , volcanic ash , banded ...
Page 64
... rocks detached from rock walls . Rockfalls are distinguished by a very high velocity resulting from the free fall . Their size ranges from isolated stones to enormous masses of rock . The stones and blocks that fall build up talus , or ...
... rocks detached from rock walls . Rockfalls are distinguished by a very high velocity resulting from the free fall . Their size ranges from isolated stones to enormous masses of rock . The stones and blocks that fall build up talus , or ...
Page 1036
... rocks ; the yet older , or primitive , rocks of the earth's crust have disappeared through time . These ancient shield , or platform , rocks of Europe , some of which have stood above the sea throughout much of geological time , were ...
... rocks ; the yet older , or primitive , rocks of the earth's crust have disappeared through time . These ancient shield , or platform , rocks of Europe , some of which have stood above the sea throughout much of geological time , were ...
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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