Mt etna carbon dating
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.
(The volcano lava flows have Indian artifacts in them, and go over the canyon walls.) These rocks were dated using the same method in the lab and were assigned an age of 1.3 billion years old.
Yet the column and its assumptions are used along with index fossils to assign dates to sedimentary rock layers and which in turn is used to date any fossil in that rock layer.
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).
The radio-dating calculations are based on a series of Assumptions: 1) The decay rate has not changed.
A Summary of the Million Dollar RATE Research Project (Radioisotopes and the Age of The Earth) Introduction: Rocks and fossils do not come with dates on them.
In fact, the very concept of strata representing long ages does not come from the rock strata themselves.