The New Encyclopaedia Britannica, Volume 29Encyclopaedia Britannica, 1974 - Encyclopedias and dictionaries |
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Page 115
... fossil record 6 : 15a plant fossil records of major groups 7 : 574e pollen stratigraphy and evolution 14 : 740g ; illus . ⚫rain forest geological history 10 : 342a -reptile evolution trends 15 : 737a ; illus . 736 ⚫sedimentary red ...
... fossil record 6 : 15a plant fossil records of major groups 7 : 574e pollen stratigraphy and evolution 14 : 740g ; illus . ⚫rain forest geological history 10 : 342a -reptile evolution trends 15 : 737a ; illus . 736 ⚫sedimentary red ...
Page 142
... fossils only in Devonian marine rocks ( the Devonian Period began 395,000,000 years ago and lasted 50,000,000 years ) ; this temporal restriction makes it a useful guide or index fossil allowing correla- tion of widely separated rock ...
... fossils only in Devonian marine rocks ( the Devonian Period began 395,000,000 years ago and lasted 50,000,000 years ) ; this temporal restriction makes it a useful guide or index fossil allowing correla- tion of widely separated rock ...
Page 689
... Fossil Plants of the Coal Measures ( 1872-94 ) . Williamson ether synthesis , method by which an ether is produced by the interaction of an alkyl halide with a metal alcoholate or phenolate . ether production reaction processes 1 : 458e ...
... Fossil Plants of the Coal Measures ( 1872-94 ) . Williamson ether synthesis , method by which an ether is produced by the interaction of an alkyl halide with a metal alcoholate or phenolate . ether production reaction processes 1 : 458e ...
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