Carbon dating system flawed
by Tas Walker Darwin considered the Australian Aborigines as primitive and not much evolved from the ‘anthropoid apes’.He anticipated that the ‘wilder races’ would become extinct because survival of the fittest meant they would be superseded by the evolutionarily-advanced ‘civilised’ races.[A Conventional Radiocarbon Age or CRA, does not take into account specific differences between the activity of different carbon reservoirs.A CRA is derived using an age calculation based upon the decay corrected activity of the absolute radiocarbon standard (1890 AD wood) which is in equilibrium with atmospheric radiocarbon levels (as mentioned previously, 1890 wood is no longer used as the primary radiocarbon standard, instead Oxalic Acid standards I and II were correlated with the activity of the original standard).‘We can use the inclusions to date different parts of an individual diamond, and that allows us to potentially look at how the processes that formed diamonds may have changed over time and how this may be related to the changing carbon cycle on Earth.’ Sixteen diamonds from two mines in north eastern Botswana were analysed in the study: seven specimens from the Orapa mine and nine from the Letlhakane mine.A team at VU Amsterdam measured the radioisotope, nitrogen and trace element contents of inclusions within the diamonds.The quantitative approach is admirable, but Buffon's assumptions are flawed. Silicate minerals have lower heat conductivity than steels and are better insulators leading to slower cooling rates.
Such a view was not good for the first Australians.
Analysis of the inclusions also suggests that the way that carbon is exchanged and deposited between the atmosphere, biosphere, oceans and geosphere may have changed significantly over the past 2.5 billion years.
‘Although a jeweller would consider diamonds with lots of inclusions to be flawed, for a geologist these are the most valuable and exciting specimens,’ said Prof Gareth Davies, of Vrije Universiteit (VU) Amsterdam, who co-authored the study.
(Perhaps it was because of isolation and the pressure to cope with a worsening climate as the continent dried out after the Ice Age.) They, like other peoples, are made ‘in the image of God’ (Genesis ).
Then, in 1999, Thorne (not to be outdone) and other scientists from the Australian National University published a new comprehensive study on the age of Mungo Man. Bowler and Magee described this 20,000-year stretch as ‘commendable in intent.’ There was just one small problem.