consequences of dating in islam - Types of dating rocks
In order to determine the age of an individual layer, a geologist must collect a sample of that layer and take it back to the lab.
In order for any material to be included within in the rock it must have been present at the time the rock was lithified.
For example, in order to get a pebble inside an igneous rock it must be incorporated when the igneous rock is still molten-- such as when lava flows over the surface.
Note how the oldest rocks in the Grand Canyon are on the bottom and the youngest rocks are on the top (more about layers).: Carbon-14 is the best known radiometric dating technique, but it can only be used to date objects younger than about 40,000 years.
It also only works for objects that contain carbon.
Finally, the geologist can calculate the rock's age.