edades de la tierra|Escala temporal geológica,mp4ufree

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 acedades de la tierracount for heat produced

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

Eones: cada una de las divisiones mayores de tiempo de la historia de la Tierra usadas en la escala temporal geológica.; Eras: períodos en la historia que se caracteriza por un nuevo orden de cosas.; Épocas: puntos de。

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