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 61
... distant age . A little reflection will explain why , along the rising coast of the western side of South America , no extensive formations with recent or ter- tiary remains can anywhere be found , though the supply of sediment must for ...
... distant age . A little reflection will explain why , along the rising coast of the western side of South America , no extensive formations with recent or ter- tiary remains can anywhere be found , though the supply of sediment must for ...
Página 68
... distant future , a geologist , ex- amining these beds , would be tempted to conclude that the average duration of life of the embedded fossils had been less than that of the glacial period , instead of hav- ing been really far greater ...
... distant future , a geologist , ex- amining these beds , would be tempted to conclude that the average duration of life of the embedded fossils had been less than that of the glacial period , instead of hav- ing been really far greater ...
Página 74
... distant epoch . Wherever sediment did not accumulate on the bed of the sea , or where it did not accumulate at a sufficient rate to protect organic bodies from decay , no remains could be preserved . Formations rich in fossils of many ...
... distant epoch . Wherever sediment did not accumulate on the bed of the sea , or where it did not accumulate at a sufficient rate to protect organic bodies from decay , no remains could be preserved . Formations rich in fossils of many ...
Página 75
... distant in futu- rity as the secondary formations lie in the past , would generally be formed in the archipelago only during periods of subsidence . These periods of subsidence would be separated from each other by immense in- tervals ...
... distant in futu- rity as the secondary formations lie in the past , would generally be formed in the archipelago only during periods of subsidence . These periods of subsidence would be separated from each other by immense in- tervals ...
Página 82
... distant seas . From these considerations , from our ignorance of the geology of other countries beyond the confines of Europe and the United States , and from the revolution in our palæontological knowledge effected by the dis- coveries ...
... distant seas . From these considerations , from our ignorance of the geology of other countries beyond the confines of Europe and the United States , and from the revolution in our palæontological knowledge effected by the dis- coveries ...
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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