edades de la tierra|Eras geológicas: qué son y sus características,memek smp viral

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 nuedades de la tierraestros 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

Las eras geológicas son un tipo de división del tiempo geológico, es decir, de la escala utilizada para medir la historia del planeta y de la vida desde sus comienzos.

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