US Geological Survey Bulletin Even when phenocrysts as in Austin's Figure 4 and xenocrysts can be seen with an optical microscope, they can be extremely difficult, if not impossible, to effectively separate from the glass. This method is used only on metamorphic and igneous rocks — not sedimentary rocks which are rocks laid down by water — and is where the fossils are primarily found. We know the exact day of this eruption because Pliny the Younger carefully recorded the event. Sample was claimed to be less than 20, years old, and Sample L was greater than 28,
However, Dr Austin's results Table 1 show that the wrong ages were not confined to one particular mineral.
Evolution's Radiometric Dating Methods: Are they accurate?
There are three important things to note about these results. Why did Austin waste precious time and money analyzing samples that were known to contain mineral and glass impurities? Top 10 Our Generation's Sins: The second possibility is that so-called "excess argon" could have become trapped in the Mount St. Creationists seem to think that a few examples of incorrect radiometric ages invalidate all of the results of radiometric dating, but such a conclusion is illogical. Austin simply assumes that the first explanation is correct and then he proceeds to use the 'presence' of 'excess argon' in his samples to question the reliability of all K-Ar dates on other rocks and minerals.