Problems with radioactive carbon dating dating site for married women
There is a radioactive form of thorium that also decays into lead.There is an isotope of samarium that decays into neodymium, and one of rubidium that decays into strontium.An hour glass is only useful if it is not disturbed.But after rocks crystallize from molten magma, they can be heated and cooled; they can be affected by metamorphic events and groundwater.‘It’s only had two new heads and three new handles.’ The question is: how old was his axe? When a geologist hammers off a sample of rock he needs to know its history.
For example, there is a radioactive form of potassium (potassium-40) that decays into argon (argon-40).
Some minerals may have crystallized even later still when ground waters in the area percolated through the pores of the rock.
So the age of a rock is quite a complicated question, and we first need to know its entire history before we can develop a story to explain the isotopic measurements.
That’s because we did not observe what happened in the past when the rock formed.
Neither can we travel into the past to make the necessary measurements. This is the fatal problem that essentially makes radioactive dating useless as a primary method for determining age. They may assume that different minerals in the rock originally had the same isotopic ratios to start with.
These geologic events can cause elements to be gained and lost to the rock.