来自不同来源的数据，包括存留在海底沉积物中的地球化学依据，表明晚白垩纪的气候比如今的要温和。
Data from diverse sources, including geochemical evidence preserved in seafloor sediments, indicate that the Late Cretaceous climate was milder than today's.
虽然在地质记录中有十几次甚至更多的大灭绝，但白垩纪的大灭绝总是引起古生物学家的兴趣，因为它标志着恐龙时代的结束。
While there are a dozen or more mass extinctions in the geological record, the Cretaceous mass extinction has always intrigued paleontologists because it marks the end of the age of the dinosaurs.
望着……三角龙：从白垩纪的恐龙(新恐龙收集)。
Looking at... Triceratops: a Dinosaur from the Cretaceous Period New Dinosaur Collection.
桂东南和桂西南地区中生代三叠纪和白垩纪的火山活动活跃。
The Triassic and Cretaceous volcanisms in the southeast and southwest Guangxi were active.
这意味着我们有关巴拉乌尔龙的记录限定于白垩纪的晚期的晚期。
That means that our record of Balaur is restricted to the very end of the Cretaceous.
在北非不同的地方使用这个名称，包括从石炭纪到早白垩纪的地层。
The term is used at various localities in north africa, includes beds ranging from carboniferous to early cretaceous .
天外来客对地球的撞击与白垩纪的物种灭绝事件有着最为密切的联系。
An extraterrestrial impact is most closely linked to the Cretaceous extinction event.
众所周知现代鸟类不长牙齿，而其侏罗纪和白垩纪的祖先则长有牙齿。
It is well known that modern aves lack dentition unlike their toothed ancestors of the Jurassic and cretaceous periods.
众所周知现代鸟类不长牙齿，而其侏罗纪和白垩纪的祖先则长有牙齿。
It is well known that modern Aves lack dentition, unlike their toothed ancestors of the Jurassic and cretaceous periods.
最近发现的这张蜘蛛网是白垩纪的，那时候，地球上还有恐龙在行走。
The web found recently dates to the Cretaceous period. At that time, dinosaurs walked the earth.
这个有着6550万年历史的地层分离了白垩纪的化石和第三纪的化石。
This 65.5-million-year-old layer of Earth separates fossils of the Cretaceous period from those of the Tertiary period.
最有名最分布广泛的是白垩纪的白垩，如英吉利海峡两岸峭壁上暴露者。
The best known and most widespread chalks are of Cretaceous age, such as those exposed in cliffs on both sides of the English Channel.
然而进一步的说，人类对于地球的影响，完全相当于白垩纪的彗星撞击。
Yet, upon further reflection, human impact on the planet is a direct analogue of the Cretaceous cometary collision.
松辽盆地白垩纪出现多期缺氧地质事件，它与全球白垩纪的地质事件相对应。
Corresponding to the Cretaceous global events, there are several times of anoxic events in the Songliao Basin.
结果表明这一带的白垩系地层沉积于晚白垩纪，或至少含有晚白垩纪的沉积。
The results show that the Cretaceous strata located in Sancha-Sidianwas deposited in late Cretaceous. At least, it contains late Cretaceous strata.
几种四足食草性长角的恐龙，巨大的颅骨呈鸟嘴状；生活在后白垩纪的北美和蒙古。
Any of several four-footed herbivorous horned dinosaurs with enormous beaked skulls; of the late cretaceous in North America and Mongolia.
利用平衡剖面对地震剖面进行了平衡恢复，恢复了侏罗纪与白垩纪的原始与剥蚀后形态。
Meanwhile, the cross sections before and after erosion in Jurassic and Cretaceous times were revealed by cross section restoration.
与华南板块东南缘白垩纪的古地磁数据对比表明，晚白垩世海南地块仍是华南板块的一部分。
Compared with the Cretaceous paleomagnetic data from the southeastern Huanan Block, Hainan Island is a part of the Huanan Block in Late Cretaceous.
但是很不幸的是，这段迅速的进化过程发生于中白垩纪的一千五百万年间，而这段时期的鲜有化石记录。
"But there were a hundred million years of evolution to play with."
这项发现将开花植物开始多样化的时间推到了大约一亿两千七百万年前，那时正是白垩纪的早期。
Its discovery pushes back the date of when flowering plants diversified to around 127 million years ago, during the early Cretaceous period.
它所能捕食的猎物包括昆虫、小型哺乳动物、两栖动物以及可能生活在沼泽和森林后白垩纪的小型恐龙。
Among its prey would have been insects, small mammals, amphibians and possibly small dinosaurs that lived in the swamps and forests of the late Cretaceous.
现今的磷灰石裂变径迹年龄格局基本上受控于白垩纪的快速抬升冷却事件，但最后为晚期活动断裂所定格。
The present AFT age pattern is, therefore, basically controlled by the Cretaceous rapid cooling event but finally shaped through active faults.
但是在将近1亿年前，现代蛇类的近亲们靠着它们船桨似的尾巴在白垩纪的水流里随波起伏，拖曳着它们短小而笨拙的后腿。
But nearly 100 million years ago relatives of modern snakes undulated through Cretaceous period waters aided by a paddlelike tail and dragging a pair of short, footless hind legs.
一亿两千万年前，白垩纪的海洋覆盖着现在的澳大利亚南部，一条鱼龙（注：一种类似鱼和海豚的大型海栖爬行动物）经历了十分糟糕的一天。
One hundred and twenty million years ago, when a Cretaceous sea covered what is now South Australia, an ichthyosaur had a really bad day.
但是B .sealeyi完全是一个新物种，在别处没有类似的——这也证明了，在西南部地区也有特定的位于食物链最高层的食肉动物，他们潜伏在白垩纪的热带森林和河流附近。
But B. sealeyi is a completely new species, found nowhere else-proving that the Southwest had its own top predator stalking the tropical forests and rivers of the late Cretaceous period.
57英尺长，9吨重，棘龙在大约1亿年前的白垩纪早期就开始四处活动。
Fifty-seven feet long and up to nine tons, spinosaurus started poking his head around the early Cretaceous some 100 million years ago.
海洋沉积物中浮游生物的这种变化标志着白垩纪和第三纪的分界线。
This change in plankton found in marine deposits is what marks the boundary between the Cretaceous and the Tertiary.
海洋沉积物中浮游生物的这种变化标志着白垩纪和第三纪的分界线。
This change in plankton found in marine deposits is what marks the boundary between the Cretaceous and the Tertiary.
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