n. 上新世, 上新世岩

[ noun ]
from 13 million to 2 million years ago; growth of mountains; cooling of climate; more and larger mammals
<noun.time>

Pliocene \Pli"o*cene\, a. [Written also pleiocene.] [Gr. ? more
+ ? new, recent.] (Geol.)
Of, pertaining to, or characterizing, the most recent
division of the Tertiary age.


Pliocene \Pli"o*cene\, n. (Geol.)
The Pliocene period or deposits.