On the Origin of Species by Means of Natural Selection, Or, The Preservation of Favoured Races in the Struggle for LifeAppleton, 1898 |
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Página 52
... deposited . As Lyell has well remarked , the extent and thickness of our sedimentary formations are the result and the measure of the denudation which the earth's crust has elsewhere undergone . Therefore a man should examine for ...
... deposited . As Lyell has well remarked , the extent and thickness of our sedimentary formations are the result and the measure of the denudation which the earth's crust has elsewhere undergone . Therefore a man should examine for ...
Página 58
... deposited over nearly the whole bed of the sea , at a rate sufficiently quick to embed and preserve fossil re- mains . Throughout an enormously large proportion of the ocean , the bright blue tint of the water bespeaks its purity . The ...
... deposited over nearly the whole bed of the sea , at a rate sufficiently quick to embed and preserve fossil re- mains . Throughout an enormously large proportion of the ocean , the bright blue tint of the water bespeaks its purity . The ...
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 67
... deposited , it would be equally rash to suppose that it then became extinct . We forget how small the area of Europe is compared with the rest of the world ; nor have the sev- eral stages of the same formation throughout Europe been ...
... deposited , it would be equally rash to suppose that it then became extinct . We forget how small the area of Europe is compared with the rest of the world ; nor have the sev- eral stages of the same formation throughout Europe been ...
Página 68
... deposited in shallow water near the mouth of the Mississippi during some part of the glacial period shall have been upraised , organic remains will prob- ably first appear and disappear at different levels , ow- ing to the migrations of ...
... deposited in shallow water near the mouth of the Mississippi during some part of the glacial period shall have been upraised , organic remains will prob- ably first appear and disappear at different levels , ow- ing to the migrations of ...
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Términos y frases comunes
admit affinity allied species ancient animals appear Archipelago arctic areas become believe birds Cambrian changes characters cies classification climate closely allied common progenitor continent crustaceans degree deposited difficulty distant distinct species domestic doubt embryo eral 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 sediment seeds Silurian South America stage stamens sterility structure successive suppose terrestrial tertiary theory tion variations varieties whilst widely different wings