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În prealabil postat de iuliu46
Nu am ce sa citesc ca este totul rationament circular. La fel e si in cazul pamantului tanar, un animal care a trait acum 5000 de ani sa spunem avea la momentul mortii mult mai putin C14 decat are un animal care moare astazi. De aceea 40k ani sunt in realitate cateva mii de ani. Daca rejectezi datele atunci arunca totul pe foc si gata.  |
The ratio of normal carbon (carbon-12) to carbon-14 in the air and in all living things at any given time is nearly constant. Maybe one in a trillion carbon atoms are carbon-14. The carbon-14 atoms are always decaying, but they are being replaced by new carbon-14 atoms at a constant rate. At this moment, your body has a certain percentage of carbon-14 atoms in it, and all living plants and animals have the same percentage.
As soon as a living organism dies, it stops taking in new carbon. The ratio of carbon-12 to carbon-14 at the moment of death is the same as every other living thing, but the carbon-14 decays and is not replaced. The carbon-14 decays with its half-life of 5,700 years, while the amount of carbon-12 remains constant in the sample. By looking at the ratio of carbon-12 to carbon-14 in the sample and comparing it to the ratio in a living organism, it is possible to determine the age of a formerly living thing fairly precisely.
Because the half-life of carbon-14 is 5,700 years, it is only reliable for dating objects up to about 60,000 years old.
Dar alegi sa ramai ignorant fata de datarea folosind zircon, nu? Bine, alegerea ta. Nu sunt eu acela care nu a luat in considerare realitatea. Nu stiu unde vezi circularitatea, dar fie, alegerea ta.