Oxygen isotopic ratios in the dating of ice cores Free cam live sex egypt arabic chat room
by Holli Riebeek • May 6, 2005 Oxygen is one of the most significant keys to deciphering past climates.
Oxygen comes in heavy and light varieties, or isotopes, which are useful for paleoclimate research.
material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples.
Following the development of radiometric age-dating in the early 20th century, measurements of lead in uranium-rich minerals showed that some were in excess of a billion years old.
It is hypothesised that the accretion of Earth began soon after the formation of the calcium-aluminium-rich inclusions and the meteorites.