Paleocene meaning

pālē-ə-sēn
Of, relating to, or being the epoch of geologic time from 65 to 55 million years ago, the oldest epoch of the Tertiary Period. It is characterized by the formation of the Rocky Mountains and by the appearance of placental mammals.
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The Paleocene Epoch.
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Designating or of the first geologic epoch of the Paleogene, characterized by lower sea levels, the development of modern mountain ranges, and the development of flowering plants, birds, and mammals.
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The earliest epoch of the Tertiary Period, from about 65 to 58 million years ago. During this time, the Rocky Mountains formed and sea levels dropped, exposing dry land in North America, Australia, and Africa. Many new types of small mammals evolved and filled the niches left empty after the extinctions that ended the Cretaceous Period. Soft-bodied squid replaced the ammonites as the dominant form of mollusk.
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the Paleocene
  • the Paleocene Epoch or its rocks
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Idioms and Phrasal Verbs

the Paleocene