Fossil dating for kids
Many of these organisms have left their remains as fossils in sedimentary rocks.
Geologists have studied the order in which fossils appeared and disappeared through time and rocks. Fossils can help to match rocks of the same age, even when you find those rocks a long way apart.
Fossils are formed when minerals in groundwater replace materials in bones and tissue, creating a replica in stone of the original organism or of their tracks.
The study of fossils is the domain of paleontology.
The oldest fossils (of bacteria) are 3.8 billion years old.
Relative dating is used to arrange geological events, and the rocks they leave behind, in a sequence.
Some of the most useful fossils for dating purposes are very small ones.
Bring relative dating principles to life with the activity Rock layers and relative dating.