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the Tertiary period
/tˈɜːʃjɚɹi pˈiəɹɪəd/
/tˈɜːʃjəɹɪ pˈiəɹɪəd/
The Tertiary period
01
a division of earth's geological time that began about 66 million years ago and lasted until about 2.6 million years ago
Examples
The Tertiary Period saw the diversification of mammals after the extinction of the dinosaurs.
During the Tertiary Period, Earth's climate gradually cooled, leading to the formation of ice sheets.
