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15-Feb-2020 15:26

Lead-206 and lead-207 are also believed to be present in primordial lead since there is insufficient uranium to account for all the lead.

In 1972, however, Gale showed unequivocally that there is by no means sufficient uranium and thorium to account for what could previously have been called radiogenic lead.

magazine has been continuously published since 1978, we are publishing some of the articles from the archives for historical interest, such as this.