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In fact, the very concept of strata representing long ages does not come from the rock strata themselves.
This allows the dating of much older and smaller samples but at a far higher cost.
It caused massive sedimentary layering and sorting and fossilizing of the creatures buried therein.
C) dating usually want to know about the radiometric dating methods that are claimed to give millions and billions of years—carbon dating can only give thousands of years.
So in order to date most older fossils, scientists look for layers of igneous rock or volcanic ash above and below the fossil.
Scientists date igneous rock using elements that are slow to decay, such as uranium and potassium.