Answer: Cosmic rays in the upper atmosphere are constantly converting the isotope nitrogen-14 (N-14) into carbon-14 (C-14 or radiocarbon). Living organisms are constantly incorporating this C-14 into their bodies along with other carbon isotopes. When the organisms die, they stop incorporating new C-14, and the old C-14 starts to decay back into N-14 by emitting beta particles. The older an organism's remains are, the less beta radiation it emits because its C-14 is steadily dwindling at a predictable rate. So, if we measure the rate of beta decay in an organic sample, we can calculate how old the sample is. C-14 decays with a half-life of 5,730 years.
A few examples of wild dates by radiometric dating:
Shells from living snails were carbon dated as being 27,000 years old. 3
Living mollusk shells were dated up to 2,300 years old. 4
A freshly killed seal was carbon dated as having died 1,300 years ago. 5
“One part of the Vollosovitch mammoth carbon dated at 29,500 years and another part at 44,000.” 6
“Structure, metamorphism, sedimentary reworking, and other complications have to be considered. Radiometric dating would not have been feasible if the geologic column had not been erected first.”7
Material from layers where dinosaurs are found carbon dated at 34,000 years old.8
Science vol. 224, 1984, pp. 58-61 ↩
Science vol. 141, 1963, pp. 634-637 ↩
Antarctic Journal vol. 6, Sept-Oct. 1971, p. 211 ↩
Troy L. Pewe, “Quaternary Strigraphic Nomencature in Uniglaciated Central Alaska,” Geologic Survey Professional Paper 862 (U.S. Gov. Printing Office, 1975) p. 30 ↩
J. E. O’Rourke, “Pragmatism vs. Material- ism in Stratigraphy,” American Journal of Science, vol. 276 (January,1976), p. 54 ↩
Reginald Daly, Earth’s Most Challenging Mysteries, 1972, p. 280 ↩
Carbon 2 what date? Can you really trust carbon dating. Here's for scientific sites that don't agree with each other.
Different dates on how far back one can use carbon dating....
Radiocarbon dating doesn't work well on objects much older than twenty thousand year.
Carbon dating is reliable for 50-60,000 years back. Beyond that, there isn't enough radiocarbon left to tell much.
Next and again.....
It has proven to be so accurate that it can identify within a few years the ages of objects up to 70,000 years old.
Psalms 118:9 It is better to trust in the LORD than to put confidence in man.
So, is carbon dating accurate? It is for specimens which only date back a few thousand years. Anything beyond that is problematic and highly doubtful. - See more at: http://www.allaboutarchaeology.org/is-carbon-dating...
I have documentation of an Allosaurus bone that was sent to The University of Arizona to be carbon dated. The results were 9,890 +/- 60 years and 16,120 +/- 220 years.
"We didn't tell them that the bones they were dating were dinosaur bones. The result was sample B at 16,120 years. The Allosaurus dinosaur was supposed to be around 140,000,000 years. The samples of bone were blind samples."
This test was done on August 10, 1990