How Old Is the Mount St. Helens Lava Dome? austin to apply geocron's potassium-argon dating to his sample of dacite known to be only six years old. 40ar/39ar dating into the historical realm: calibration against pliny the younger. with k-ar dating when the truth is quite the opposite.. etna basalt, sicily, erupted in 1971, but rocks were dated 140,000 to 350,000 yrs old., seems like you are not familiar with c14 and how it is very different from other forms of radiometric dating. furthermore, the dating was done in 6 different laboratories and the materials were collected from 5 different locations in the western hemisphere. potassium-argon dating is done by destructively crushing and heating the sample and spectrally analyzing the resulting gases.
Carbon Dating Undercuts Evolution for example, after extensive testing over many years, it was concluded that uranium-helium dating is highly unreliable because the small helium atom diffuses easily out of minerals over geologic time. because of their importance, meteorites have been extensively dated radiometrically; the vast majority appear to be 4. it is these studies, and the many more like them documented in the scientific literature, that the creationists need to address before they can discredit radiometric dating. measuring the age of this impact event independently of the stratigraphic evidence is an obvious test for radiometric methods, and a number of scientists in laboratories around the world set to work., if results are found that differ from hypothesized, such as the level of helium in the zircon, isn’t the best scientific method to search for an explanation, rather than give up and assume that the u/pb dating is completely false and therefore creation is correct? the radio-dating calculations are based on a series of assumptions:1) the decay rate has not changed. third, the radiometric ages agree, within analytical error, with the relative positions of the dated ash beds as determined by the geologic mapping and the fossil assemblages; that is, the ages get older from top to bottom as they should.