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Establece divisiones y subdivisiones de las rocas según su edad relativa y del tiempo absoluto traedades de la tierranscurrido desde la formación de la Tierra hasta la actualidad, en una doble。

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

La edad de la Tierra indica el tiempo transcurrido desde su origen hasta nuestros días. Los geólogos y geofísicos modernos consideran que la edad de la Tierra es de unos 4540 millones de años ± 1 %. Esta edad había sido determinada mediante técnicas de datación radiométrica de material proveniente de。 See more

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The contents of the German Brooke Shields article are those which were published in France: 6 pages, 5 colour photos by Gary Gross.Interesting to know: The German versions arent a 1:1。

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