Isn t carbon dating used dinosaur bones
Samples were picked from fossils under a binocular microscope, mounted on SEM stubs, gold-coated and examined with a Hitachi S-3500N variable pressure microscope equipped with an EDAX Genesis energy dispersive spectrometer.Low concentrations of the structural protein collagen have recently been reported in dinosaur fossils based primarily on mass spectrometric analyses of whole bone extracts.The organic matter (collagen) and hard carbonate bone mineral (bioapatite) in the bone samples were analyzed.The samples came from several species of dinosaurs (acrocanthosaur, hadrosaurus, triceratops and apatosaurus) taken from various sites in Texas, Colorado, Arkansas and Montana.The resultant C-14 ages obtained from these samples were consistently in the 22,000 - 39,000 years range.The fact that the samples were from a variety of species and sites all giving consistent results greatly reduces the chance that the results are from contamination.Reporters, so far, are sticking to their story that the evidence merely demonstrates that soft tissue last for 75 million years.This estimate, however, is about 18 times longer than the previous “expert” opinion about the longevity of collagen, especially in its quaternary structure. Four million years was already a stretch for many who said soft tissue degrades quickly after death.
This new paper, however, is noteworthy in many respects that will challenge naysayers: Another standout feature of this paper is the undercurrent of emotion.
Scientific papers tend to be stodgy and understated in tone.
These scientists used “exciting” twice, and a scattering of other “surprise” words: The paper is timely, seeing that the latest dinosaur movie “Jurassic World” hits the theaters in two days.
team of researchers from North Carolina State University and the Palo Alto Research Center (PARC) has found more evidence for the preservation of ancient dinosaur proteins, including reactivity to antibodies that target specific proteins normally found in bone cells of vertebrates.
These results further rule out sample contamination, and help solidify the case for preservation of cells – and possibly DNA – in ancient remains. images of organically preserved muscle fibres in fossils from Grube Messel.
Geologists draw on it and other basic principles ( to determine the relative ages of rocks or features such as faults.