yr BP

Dictionary of units of measurement. 2015.

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  • radiocarbon year — (14C yr, yr BP)    a unit used in stating the nominal ages of plant or animal remains dated by radiocarbon testing. A very small proportion (roughly 1 part per trillion, or 10 12) of the carbon in the ecosystem is radioactive carbon 14, which… …   Dictionary of units of measurement

  • Piora Oscillation — The Piora Oscillation was an abrupt cold and wet period in the climate history of the Holocene Epoch; it is generally dated to the period of c. 3200 to 2900 BCE. [ [http://www.news about space.org/story/2409.html Space and Earth Science News… …   Wikipedia

  • Oscilación de Piora — La oscilación de Piora fue un abrupto periodo frío y húmedo en la historia del clima del Holoceno. Variaciones de temperatura en el Holoceno. Generalmente se lo data entre el 3200 y el 2900 a. C.[1] …   Wikipedia Español

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