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Os fósiles e as medidas do tempo xeolóxico

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Os fósiles e as medidas do tempo xeolóxico

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Os fósiles e as medidas do tempo xeolóxico
 

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Os fósiles e as medidas do tempo xeolóxicoOnline version

Os fósiles e as medidas do tempo xeolóxico

by Xinyao Chen Chen
1

Un e un resto dun ser vivo ou da súa actividade vital que queda conservado nas rochas .
A ciencia encargada do estudo dos fósiles é a .
Os son fósiles que presentan unha ampla distribución xeográfica e unha escasa distribución temporal .
A é un conxunto de técnicas que permiten medir o tempo xeolóxico . Dependendo das técnicas , distínguense dous tipos de datacións : e .
Os son un tipo de técnicas de xeocronoloxía absoluta baseadas nas pautas de desenvolvemento rítmicas que moitos seres vivos mostran . No caso das árbores , cada parella de representa do seu crecemento
A xeocronoloxía trata de ordenar os acontecementos xeolóxicos determinando cal ocorreu antes e cal despois .
A calcula a idade dun material baseándose nas porcentaxes que ten de elemento inicial e de elemento resultante por desintegración .
O comprende todos os materiais e procesos desde a formación da Terra ata a aparición de rochas con abundantes restos de seres vivos .