Can radiometric dating be wrong mark ballas dating 2016
From the mapped field relationships, it is a simple matter to work out a geological cross-section and the relative timing of the geologic events.
Here he can see that some curved sedimentary rocks have been cut vertically by a sheet of volcanic rock called a dyke.Would he have concluded that the fossil date for the sediments was wrong? Would he have thought that the radiometric dating method was flawed? Instead of questioning the method, he would say that the radiometric date was not recording the time that the rock solidified.He may suggest that the rock contained crystals (called xenocrysts) that formed long before the rock solidified and that these crystals gave an older date.From his research, our evolutionary geologist may have discovered that other geologists believe that Sedimentary Rocks A are 200 million years old and Sedimentary Rocks B are 30 million years old.
Thus, he already ‘knows’ that the igneous dyke must be younger than 200 million years and older than 30 million years.by Tas Walker A geologist works out the relative age of a rock by carefully studying where the rock is found in the field.