The New Encyclopædia Britannica, Volume 16Encyclopaedia Britannica, 1981 - Encyclopedias and dictionaries |
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Page 497
... ROCKS ; SEDIMENTARY ROCKS ; METAMORPHIC ROCKS ; ROCK MAGNETISM ; and SEA- FLOOR SPREADING . See also ARCHAEOLOGY ; CHEMICAL ELE . MENTS ; ISOTOPES ; and RADIOACTIVITY . I. Relative dating Historically , determination of relative - age ...
... ROCKS ; SEDIMENTARY ROCKS ; METAMORPHIC ROCKS ; ROCK MAGNETISM ; and SEA- FLOOR SPREADING . See also ARCHAEOLOGY ; CHEMICAL ELE . MENTS ; ISOTOPES ; and RADIOACTIVITY . I. Relative dating Historically , determination of relative - age ...
Page 498
... rocks , they define the original top and bottom by their asym- metric pattern . Certain fossils also accumulate in a dis- tinctive pattern or position that serves to define the top- side . Another factor which causes complications in ...
... rocks , they define the original top and bottom by their asym- metric pattern . Certain fossils also accumulate in a dis- tinctive pattern or position that serves to define the top- side . Another factor which causes complications in ...
Page 505
... rocks containing such minerals as zircon , uraninite , monazite , pitchblende , xenotime , samarskite , thorianite ... rocks containing muscovite , biotite , phlogopite , lepidolite , sanidine , hornblendet ; sedimentary rocks containing ...
... rocks containing such minerals as zircon , uraninite , monazite , pitchblende , xenotime , samarskite , thorianite ... rocks containing muscovite , biotite , phlogopite , lepidolite , sanidine , hornblendet ; sedimentary rocks containing ...
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19th century Africa American animals areas became bee-eaters cells centimetres central centre century Church collagen conifers connective tissue conodonts conservation conservatism constitution continental continental drift copper Coraciiformes coral cosmic rays countries court covenant Cretaceous Crete cricket crime criminal Cro-Magnon crocodiles Crusade cultural deposits disease early Earth economic effect energy England Europe federal forest fossil France French function genera geosynclines groups hoopoes hornbills illus important industrial Iráklion island King known land later Le Corbusier legislation major ment metres minerals modern natural North Nyssaceae occur ocean Ordovician organized original Parliament particles party percent period plants political pollution population problems protection reefs region result River rock Roman Saladin sediments social South Soviet species structure theory tion town trade traditional trees tropical trouvères Union United usually western