单词 | Tertiary period |
释义 | Tertiary period (once / 26501 pages) n WORD FAMILY Tertiary period: Tertiary periods USAGE EXAMPLESThe abrupt disappearance of forams in these layers of rock indicated that something had happened at the boundary between the Cretaceous and Tertiary periods. New York Times(Jun 25, 2012) It appeared on earth latest at the commencement of the Quaternary geological period, but more probably towards the end of the Tertiary period. Nordau, Max Simon, Morals and the Evolution of Man(2011) These were all regarded as belonging to the Tertiary period. Scott, G. Firth, The Romance of Polar Exploration—In...(2011) n from 63 million to 2 million years ago Syn|Exp Tertiary geological period, period a unit of geological time during which a system of rocks formed |
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