英语词汇“geological period”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

WORD FAMILY

geological period: geological periods

USAGE EXAMPLES

On a broader scale, the extinction of large marine mammals could lead to a new geological period defined by human influence.

Time(Sep 15, 2016)

This suggest a rapid diversification of walruses during this geological period, perhaps mediated by the rising and falling sea levels.

Forbes(Aug 06, 2015)

“Disposing of CO2 as solids has already been proven to work over very long, geological periods of time.”

Scientific American(Oct 03, 2013)

n a unit of geological time during which a system of rocks formed

ganoid fishes swarmed during the earlier geological periods

Syn|Exp|Hypo|Hyper

period

Quaternary period

last 2 million years

Tertiary period

from 63 million to 2 million years ago

Cretaceous period

from 135 million to 63 million years ago; end of the age of reptiles; appearance of modern insects and flowering plants

Jurassic period

from 190 million to 135 million years ago; dinosaurs; conifers

Triassic period

from 230 million to 190 million years ago; dinosaurs, marine reptiles; volcanic activity

Permian period

from 280 million to 230 million years ago; reptiles

Carboniferous period

from 345 million to 280 million years ago

Upper Carboniferous period

from 310 million to 280 million years ago; warm climate; swampy land

Lower Carboniferous period

from 345 million to 310 million years ago; increase of land areas; primitive ammonites; winged insects

Devonian period

from 405 million to 345 million years ago; preponderance of fishes and appearance of amphibians and ammonites

Silurian period

from 425 million to 405 million years ago; first air-breathing animals

Ordovician period

from 500 million to 425 million years ago; conodonts and ostracods and algae and seaweeds

Cambrian period

from 544 million to about 500 million years ago; marine invertebrates

glacial epoch, glacial period, ice age

any period of time during which glaciers covered a large part of the earth's surface

geologic time, geological time

the time of the physical formation and development of the earth (especially prior to human history)

单词	geological period
释义	geological period (once / 24727 pages) n WORD FAMILY geological period: geological periods USAGE EXAMPLES On a broader scale, the extinction of large marine mammals could lead to a new geological period defined by human influence. Time(Sep 15, 2016) This suggest a rapid diversification of walruses during this geological period, perhaps mediated by the rising and falling sea levels. Forbes(Aug 06, 2015) “Disposing of CO2 as solids has already been proven to work over very long, geological periods of time.” Scientific American(Oct 03, 2013) n a unit of geological time during which a system of rocks formed ganoid fishes swarmed during the earlier geological periods Syn\|Exp\|Hypo\|Hyper period Quaternary period last 2 million years Tertiary period from 63 million to 2 million years ago Cretaceous period from 135 million to 63 million years ago; end of the age of reptiles; appearance of modern insects and flowering plants Jurassic period from 190 million to 135 million years ago; dinosaurs; conifers Triassic period from 230 million to 190 million years ago; dinosaurs, marine reptiles; volcanic activity Permian period from 280 million to 230 million years ago; reptiles Carboniferous period from 345 million to 280 million years ago Upper Carboniferous period from 310 million to 280 million years ago; warm climate; swampy land Lower Carboniferous period from 345 million to 310 million years ago; increase of land areas; primitive ammonites; winged insects Devonian period from 405 million to 345 million years ago; preponderance of fishes and appearance of amphibians and ammonites Silurian period from 425 million to 405 million years ago; first air-breathing animals Ordovician period from 500 million to 425 million years ago; conodonts and ostracods and algae and seaweeds Cambrian period from 544 million to about 500 million years ago; marine invertebrates glacial epoch, glacial period, ice age any period of time during which glaciers covered a large part of the earth's surface geologic time, geological time the time of the physical formation and development of the earth (especially prior to human history)
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