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In 1862, the physicist William Thomson, 1st Baron Kelvin published calculations that fixed the age of Earth at between 20 million and 400 million years. He assumed that Earth had formed as a completely molten object, and determined the amount of time it would take for the near-surface temperature gradient to decrease to its present value. His calculations did not account for heat produced

Las eras geológicas se evidencian a partir del registro fósil y de la constitución de las capas sedimentarias de la corteza terrestre, y permiten clasificar y datar temporalmente los hallazgos que hagamos mediante excavaciones, como。

En este artículo, exploraremos las eras de la Tierra y sus periodos, desde la más antigua hasta la actual, y analizaremos los principales eventos que han dado forma al planeta tal y como lo conocemos hoy en día.

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edades de la tierra Geprüfte und seriöse Kontaktanzeigen von netten Frauen aus dem gesamten Bundesgebiet kostenlos und ohne Anmeldung Lesen und Beantworten

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