When will a fossil be used in finding the absolute age of rocks?

Answer 1

A fossil can be used in finding the absolute age of rocks through a process called biostratigraphy. This method involves comparing the fossil assemblages found in different rock layers and correlating them to a known age based on the fossil record. Fossils can provide important clues about the relative age of the rocks they are found in, but to determine the absolute age, scientists usually need to use other dating methods such as radiometric dating. These techniques can provide more precise numerical ages for the rocks, but they are often complemented by the presence and characteristics of fossils.