False carbon dating reads
Carbon dating is a mainstay of geology and archaeology - but an enormous peak discovered in the amount of carbon-14 in the atmosphere between 45 thousand and 11 thousand years ago casts doubt on the biological carbon cycle that underpins the technique.The study led by physicist Warren Beck of the University of Arizona, US, could also affect estimates of how quickly the Earth can re-absorb the excess carbon dioxide generated by fossil fuels (J W Beck et al 2001 Science to appear).Living organisms and some geological features absorb stable carbon-12 and radioactive carbon-14, which are present in the air in a well-known ratio.This is part of the carbon cycle - the recirculation of carbon through the oceans, atmosphere, plants and animals.
They want to know if it is accurate or if it works at all.Carbon 14 is a radioactive variation of carbon, and because plants pick up both types through photosynthesis, all living organisms — cotton plants included — have the same ratio of carbon 14 to stable carbon as the atmosphere.But a series of nuclear bomb tests in the 1950s and 1960s spiked this normally consistent ratio.Stalagmites are calcium carbonate deposits left behind when carbon dioxide evaporates out of cave seepage water.They found that carbon-14 concentrations were twice their modern level during that period.
Search for false carbon dating reads:
C14 is continually being created and decaying, leading to an equilibrium state in the atmosphere.