Definition

Proper noun 1. The Pliocene epoch: A specific geological epoch within the Neogene period, following the Miocene and preceding the Pleistocene. It is characterized by significant global cooling, the continued uplift of major mountain ranges, and the evolution and diversification of modern mammals.

Usage

• The word "Pliocene" is always capitalized as it is a proper noun referring to a specific geological time unit.
• It is most commonly used as a noun modifier (attributive noun) before other nouns.
• It can be used with the definite article "the" when referring to the epoch as a whole.

Examples

• As a proper noun:
  • The Pliocene lasted from about 5.3 to 2.6 million years ago.
  • Fossils from the Pliocene provide clues about early human ancestors.
• As a noun modifier:
  • Pliocene clays are exposed along this cliff face.
  • Scientists study Pliocene climate to understand modern global warming.

Advanced Usage

• "Mid-Pliocene" / "Late Pliocene": Terms used to specify subdivisions within the epoch.
  • The mid- Pliocene warm period is a key focus of climate research.
• In technical geological writing, it may be part of formal stratigraphic names.
  • The formation is dated to the Pliocene Series.

Variants and Related Words

• Pliocene Epoch: The full formal name.
• Neogene: The geological period that contains the Miocene and Pliocene epochs.
• Pleistocene: The geological epoch immediately following the Pliocene, known for its ice ages.

Synonyms

• Late Tertiary (an older, less precise term that is now largely superseded).
• Neogene (broader term encompassing the Pliocene).

Notes on Meaning

The core meaning of "Pliocene" is strictly chronological and geological. The reference context highlights key characteristics (mountain growth, climate cooling, larger mammals) that define the epoch, but the word itself names the time interval during which these events occurred.

Noun

1. from 13 million to 2 million years ago; growth of mountains; cooling of climate; more and larger mammals