ScienceJohn Michels (Journalist) 1959 |
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Стр. 203
John Michels (Journalist). Poleward Migration of Early Angiosperm Flora Angiosperms only displaced the relict Jurassic - type flora at high latitudes in Late Cretaceous time . 50 % Rampart Fig . 1. North American region . Cretaceous ...
John Michels (Journalist). Poleward Migration of Early Angiosperm Flora Angiosperms only displaced the relict Jurassic - type flora at high latitudes in Late Cretaceous time . 50 % Rampart Fig . 1. North American region . Cretaceous ...
Стр. 204
... angiosperms in the lowland floras of northeast Asia is reflected in the fact that even the mid - Cretaceous ( Cenomanian - Turonian ) floras of the region rarely contain more than 40 per- cent angiosperms . Thus , the Yezo flora of ...
... angiosperms in the lowland floras of northeast Asia is reflected in the fact that even the mid - Cretaceous ( Cenomanian - Turonian ) floras of the region rarely contain more than 40 per- cent angiosperms . Thus , the Yezo flora of ...
Стр. 206
... angiosperms during Early Cretaceous time can best be explained on the as- sumption that angiosperms evolved within the ancient tropical belt ( lati- tudes 45 ° N to 45 ° S ) . With such a cen- ter of origin , it naturally follows that ...
... angiosperms during Early Cretaceous time can best be explained on the as- sumption that angiosperms evolved within the ancient tropical belt ( lati- tudes 45 ° N to 45 ° S ) . With such a cen- ter of origin , it naturally follows that ...
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