structural:summarization
Divisions

In ICS terminology, from upper (later, more recent) to lower (earlier):

The Pliocene Epoch is subdivided into two ages:

The Miocene Epoch is subdivided into six ages:

In different geophysical regions of the world, other regional names are also used for the same or overlapping ages and other timeline subdivisions.

The terms Neogene System (formal) and Upper Tertiary System (informal) describe the rocks deposited during the Neogene Period.