Principles of relative age dating Sex live albanija
Long before geologists tried to quantify the age of the Earth they developed techniques to determine which geologic events preceded another, what are termed "relative age” relationships.
These techniques were first articulated by Nicolas Steno, a Dane living in the Medici court of Italy in the 17th C.
Some of the most useful fossils for dating purposes are very small ones.
That fossil species may have been dated somewhere else, so you can match them and say that your fossil has a similar age.
Throughout the history of life, different organisms have appeared, flourished and become extinct.
Many of these organisms have left their remains as fossils in sedimentary rocks.
You can't start with the top layer and add the ones under it since there would be nothing to build on.
Principle of later continuity: The principle of lateral continuity says that rocks continue in all lateral directions, even if you can't see them on the surface.