Start Relative dating geology methods

Relative dating geology methods

He concluded, the bottom most layers were deposited first, thus making them the oldest and subsequent layers were progressively younger in age.

The Principle of Lateral Continuity: Because rock layers cover large areas of the Earths surface, scientists can relate layers in one location to another.

The correlations between one area of the Earth and another are largely based on fossil deposits. Lake or other water body sedimentation is another way these layers can be formed.

This type of dating puts events in their correct chronological order based upon the sedimentary layer in which an object is found.

It's this resetting process that gives us the ability to date rocks that formed at different times in earth history.

Radiometric dating has been used to determine the ages of the Earth, Moon, meteorites, ages of fossils, including early man, timing of glaciations, ages of mineral deposits, recurrence rates of earthquakes and volcanic eruptions, the history of reversals of Earth's magnetic field, and many of other geological events and processes.

Where do scientists begin the story of Earths history?

The age of the material being dated is commonly expressed in a number of years.