Radiometric dating of rock strata
Much later after the Grand canyon was already formed, igneous rocks were formed from a volcano on top of the canyon, that Indians saw erupt, only about 1000 years ago.
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Since the early 20th century, Radioisotope dating has been used to bolster the vast time spans ascribed to the geologic record.
However, research by geologist John Woodmorappe (a pen name) revealed that the radiometric methods used today were actually hand-picked to coincide with the dates previously assumed for the geologic column diagrams.
How can the very top, volcanic rock be older than the very bottom layer basalt rock?
Even evolutionists admit that those Indian artifacts are not 1.3 billion years old!
These dating methods rely on a series of assumptions about the amounts of the parent-daughter elements, and a constant rate of decay. It has been accepted that a rock is formed when it first cools down from a molten or semi-molten state, which may include a variety of elements, including radioactive ones. For the last 100 years we have been able to measure the decay rate, and during this time it has been very steady, very consistent.