Only in the tropics were numerous late Cretaceous groups extinguished during peaks in their evolution.
只是熱帶地區(qū)才有大批晚白堊紀(jì)生物類群正值其演化的極盛時(shí)期突然消亡.
辭典例句
The Cretaceous extinction was like a terrible streak of bad luck lasting millions of years.
白堊紀(jì)的生物絕滅,猶如一場持續(xù)千百萬年的可怕厄運(yùn).
辭典例句
The story takes place 6500 years ago in the Cretaceous period.
故事發(fā)生在6500萬年前的白堊紀(jì)晚期.
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So the researchers resorted to some techniques out of a Cretaceous CSI.
所以科學(xué)家只能借助于《犯罪現(xiàn)場調(diào)查:白堊紀(jì)篇》用到的技術(shù).
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NEW EARLY CRETACEOUS LALACID FROM JINGXI BASIN OF BEIJING, CHINA ( HOMOPTERA: FULGOROIDEA )
北京京西盆地早白堊世同翅目化石一新屬 ( 同翅目: 蠟蟬總科)(英文 )
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From the view of stratigraphy, they all belong to the Cretaceous period.
從地層學(xué)上看, 它們都屬于白堊紀(jì).
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Upper Cretaceous : Including the Sifangtai Formation — Minshui Formation, corresponding to the Cenonian — Maestrichtian.
四方臺(tái)組—明水組為白堊系上統(tǒng), 相當(dāng)于賽諾—梅斯特利克蒂階(Senonian—Maestrichtian).
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An image feet of live mainly in Jurassic and cretaceous.
蜥腳形類主要生活在侏羅紀(jì)和白堊紀(jì).
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Mineral, palaeontology, middle devonian, permian to early jurassic, and cretaceous.
收藏礦物 、 古生物學(xué) 、 中泥盆紀(jì) 、 二疊紀(jì)到早期的侏羅紀(jì)和白惡紀(jì).
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Xihu depression is a cretaceous - tertiary basin undergoing multi - episodic tectonism.
西湖凹陷是經(jīng)歷多期構(gòu)造作用的白堊 - 第三紀(jì)盆地.
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Chagan Depression is a rift subsidence basin, which has developed cretaceous hydrocarbon.
查干凹陷為一白堊紀(jì)斷陷湖盆, 發(fā)育白堊紀(jì)含油氣系統(tǒng).
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Cretaceous sandstone and Eogene mudstone are the main reservoir and caprock.
油氣從油氣田東部注入,由東向西運(yùn)移并差異聚集,依次形成凝析氣藏、帶油環(huán)凝析氣藏和揮發(fā)性油藏.
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The facies types of the Lower Cretaceous are mainly delta, lake and turbidity.
下白堊統(tǒng)的扎賚諾爾群的沉積相的主要類型為三角洲相, 湖相和濁流相.
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The prototype of Zhoukou Cretaceous basin should be of foredeep basin.
白堊紀(jì)周口盆地的盆地原型應(yīng)是山前凹陷盆地.
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A NEW EARLY CRETACEOUS FAMILY FROM LIUPANSHAN , NINGXIA, CHINA ( INSECTA, TRICHOPTERA )
寧夏六盤山早白堊世一新科 ( 昆蟲綱, 毛翅目 )
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"cretaceous rocks"