What is relative dating and radiometric dating
Geologists often need to know the age of material that they find.A Danish scientist, Nicolaus Steno is accredited for the Law of Superposition.This law basically tells us that each layer of sedimentary rock is younger than the one below it which is depicted in figure 8.3 in the text.Another relative dating process is the Principle of Cross-Cutting Relationships.
This takes place when faults force themselves through older rocks.
Geologists choose a dating method that suits the materials available in their rocks. Measuring isotopes is particularly useful for dating igneous and some metamorphic rock, but not sedimentary rock.
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