The Origin of Species by Means of Natural Selection: Or, The Preservation of Favored Races in the Struggle for Life, Volumen2AMS Press, 1972 |
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Página 62
... deposited to any thickness and extent over a shallow bottom , if it continue slowly to subside . In this latter case , as long as the rate of subsidence and the supply of sediment nearly balance each other , the sea will remain shallow ...
... deposited to any thickness and extent over a shallow bottom , if it continue slowly to subside . In this latter case , as long as the rate of subsidence and the supply of sediment nearly balance each other , the sea will remain shallow ...
Página 68
... deposited during the whole of the glacial period near the mouth of the Mississippi , within that limit of depth at which marine animals can best flourish : for we know that great geographical changes occurred in other parts of America ...
... deposited during the whole of the glacial period near the mouth of the Mississippi , within that limit of depth at which marine animals can best flourish : for we know that great geographical changes occurred in other parts of America ...
Página 105
... deposited during periods of subsidence ; and that blank intervals of vast duration , as far as fossils are concerned , occurred during the periods when the bed of the sea was either stationary or rising , and likewise when sedi- ment ...
... deposited during periods of subsidence ; and that blank intervals of vast duration , as far as fossils are concerned , occurred during the periods when the bed of the sea was either stationary or rising , and likewise when sedi- ment ...
Contenido
CONTENTS OF VOL | 1 |
CHAPTER X | 48 |
CHAPTER XII | 129 |
Derechos de autor | |
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Términos y frases comunes
accumulated adapted admit adult affinity allied species ancient animals appear Archipelago arctic areas become beds believe birds breeds Cambrian changes characters classification climate closely allied continent crustaceans degree deposited difficulty distant distinct species domestic doubt embryo Europe existing extinct fact faunas fertilised fertility flowers formations formerly forms fossil fresh-water Fritz Müller Gärtner genera genus geological period geological record Glacial period groups of species habits hybrids hybrids produced important individuals inhabitants inherited insects instance intermediate intervals land larvæ less living mammals manner marine Marsupials migration modified descendants mongrels mountains natural selection naturalists nearly occur oceanic islands offspring organisation parent parent-form peculiar perfect pistil plants pollen present probably produced quadrupeds reciprocal crosses regions remains remarked reproductive resemblance rocks rudimentary organs seeds Silurian slight South America species belonging stage stamens sterility structure successive suppose terrestrial tertiary tion variations varieties whilst widely different wings