the world > the earth > structure of the earth > age or period > [noun] > quaternary > specific (5)
Geology. In form Recent. With the. The Recent (Holocene) epoch (see sense A. 5b).
With the: the Pleistocene epoch (originally, sub-epoch); the series of rocks dating from this time.
An East African pluvial period of the Pleistocene, preceding the Makalian.
Geology. The Flandrian period.