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This has been argued before, but the testing process itself is loaded with procedures that rigorously remove contaminants.
Secular researchers routinely detect radiocarbon in carbon-containing materials like coal, oil, marble, and diamond—materials they would like to use as "carbon dead" standards.
Mr Miller told Ancient Origins that it is always desirable to carbon-14 date several fractions to minimize the possibility of errors which Miller requested and that essential concordance was achieved in the 1000's of years as with all bone fractions of ten other dinosaurs.
Triceratops, a name meaning “three-horned face”, is a genus of herbivorous ceratopsid dinosaur that is said to have first appeared during the late Maastrichtian stage of the late Cretaceous period, about 68 million years ago in what is now North America, and became extinct in the Cretaceous–Paleogene extinction event 66 million years ago.
Because radiocarbon decays relatively quickly, fossils that are even 100,000 years old should have virtually characters repeatedly mention "million years ago" in the context of their dinosaurs.
Now, the case for dramatically older proteins seems to be firming up, too.A Triceratops brow horn discovered in Dawson County, Montana, has been controversially dated to around 33,500 years, challenging the view that dinosaurs died out around 65 million years ago.The finding radically suggests that early humans may have once walked the earth with the fearsome reptiles thousands of years ago.Mr Miller sent the sample to the University of Georgia, Center for Applied Isotope Studies, for this purpose.The sample was divided at the lab into two fractions with the “bulk” or collagen break down products yielding an age of 33,570 ± 120 years and the carbonate fraction of bone bioapatite yielding an age of 41,010 ± 220 years [UGAMS-11752 & 11752a].