Start Dating layers with no ages

Dating layers with no ages

Absolute dating places events or rocks at a specific time.

Sediments less than about 50,000 years old that contain organic material can be dated based on the radioactive decay of the isotope Carbon 14.

Geologists generally know the age of a rock by determining the age of the group of rocks, or formation, that it is found in.

The age of formations is marked on a geologic calendar known as the geologic time scale.

The nuclear decay of radioactive isotopes is a process that behaves in a clock-like fashion and is thus a useful tool for determining the absolute age of rocks.