stratigraphy
In geology, stratigraphy is the study of rock layers, whether those layers are exposed or lie beneath the surface of the Earth, including how they are arranged, the differing ages of the layers (”strata”), and their composition.
In geology, stratigraphy is the study of rock layers, whether those layers are exposed or lie beneath the surface of the Earth, including how they are arranged, the differing ages of the layers (”strata”), and their composition.