The late Cretaceous extinction of the dinosaurs and ammonoids was just one of the more drastic in a whole series of such recurrent extinction episodes.
在这一系列周期性物种灭绝事件里，白垩纪晚期恐龙和菊石的灭绝仅仅是其中一个比较严重的事件。
Data from diverse sources, including geochemical evidence preserved in seafloor sediments, indicate that the Late Cretaceous climate was very mild.
来自不同来源的数据，包括保存在海底沉积物中的地球化学证据，都表明晚白垩世的气候非常温和。
Data from diverse sources, including geochemical evidence preserved in seafloor sediments, indicate that the Late Cretaceous climate was milder than today's.
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。
This story, though, raises the question of why there is but a single ejecta layer of iridium and shocked quartz in late Cretaceous rocks around the world.
然而，查特基博士的说法引发了疑问：为什么全球白垩纪晚期岩石中含有冲击石英和铱的喷发物地层只有一层？ 答案或许是，两次撞击是在同时发生的。
"The ancient drainage systems are thought to have originated in the wet climate of the late Cretaceous, they are that old," Hutchinson said.
Hutchinson说，这些古老的排水系统是在白垩纪晚期为了应付潮湿的气候而被想到的，它们已经是这样的久远。
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.
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。
Manning speculated that the dinosaur collapsed in a riverbed during the late Cretaceous Period and was rapidly buried in mineral-rich wet sand, preventing bacteria from devouring all of its tissue.
曼宁推测，在晚白垩世时期，恐龙倒在河床上，并迅速埋在矿产丰富的湿砂，(这些沙)防止了细菌吞食其所有的组织。
The actual split between the two groups, though, had happened much earlier, during the Jurassic period, and by the late Cretaceous there were many species of bird around.
尽管，这两种物种早在侏罗纪时期就已分道扬镳，而且，到了白垩纪后期，已出现了许多种的鸟类。
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.
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。
The east depression of Liaohe Basin is a Cenozonic intra continental rifting basin formed on the late Cretaceous Paleocene regional uplift.
辽河盆地东部凹陷是在晚白垩世—古新世区域隆起背景上形成的新生代板内裂陷。
After late Cretaceous, structural deformation shows a series of movable basement fault again and new's fault. The fold structure is very simple.
晚白垩纪后，构造变形表现为一系列重新活动的基底断裂和新生断裂，褶皱构造简单。
The resultant united block has drifted northward to the present position since the late Cretaceous.
晚白垩纪以后，一体化的三块体继续向北漂移，并于第四纪到达现今地理位置。
Any of several four-footed herbivorous horned dinosaurs with enormous beaked skulls; of the late cretaceous in North America and Mongolia.
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。
Middle stage of Early Cretaceous-Late Cretaceous.
早白垩世中期—晚白垩世。
Fluvial fan sedimentary system disposed at the edge of south and north basin; Braided river system disposed in the central basin in late cretaceous in Xinjiang.
晚白垩世信江盆地北缘及南缘边界断层附近发育冲积扇体系，中央洼陷区发育河流沉积体系。
Development of late Cretaceous sedimentary basins is controlled by Guangfeng - Shaoxing fault.
晚白垩世沉积盆地的发育受广丰—绍兴断裂控制。
The age of the Fuding Formation and the Shimaoshan Group may be assigned to middle-late early Cretaceous and early late Cretaceous respectively.
福鼎组和石帽山群的时代应分别为早白垩世中、晚期和晚白垩世早期。
One confounding factor is that the late Cretaceous was also a period of great volcanic activity.
但后白垩纪火山运动频繁，这一点很容易混淆视听。
The first, covering the time from late Cretaceous toPaleogene, is called the Himalayan Movement.
第一亚旋回末期的造山运动称为喜山运动。
According to the Quan 1 well Jurassic reservoirs inclusions homogenization temperature, Jurassic reservoir should be formed in late cretaceous.
根据泉1井侏罗系储层包裹体均一化温度推算，侏罗系气藏的成藏期应在晚白垩世以后。
Zhedaikou-Hushan north-east strike fracture zone with several active stages possessed the characteristics of inherited basal structure from late stage of late Jurassic to late Cretaceous.
遂昌柘岱口—湖山北东向断裂带在晚侏罗世至晚白垩世晚期经历了多期次、不同性质的活动，断裂活动与该地区两个大规模萤石矿田的形成关系密切。
The results show that the Cretaceous strata located in Sancha-Sidianwas deposited in late Cretaceous. At least, it contains late Cretaceous strata.
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。
They expected to find evidence of well-known Late Cretaceous vegetation such as conifers and cycads.
他们原本期望发现晚白垩世时期著名植物如针叶树和苏铁存在的证据。
Structure uplifting in Late Cretaceous made present reservoir pressure be normal-abnormal low.
晚白垩系构造抬升降压，使得现今储层为正常—低异常压力。
Their ages may be early Late Cretaceous and Late Cretaceous-Paleocene.
它们分属于晚白垩世早期、晚白垩世—古新世。
It can be as a marker member of Late Cretaceous for its broad distribution in geography, but short duration in geologic period and well used for strata classification and correlation.
在我国上白垩统普遍见到，其地理分布广，地质时限短，可作为晚白垩世的标志分子，在地层划分对比中举足轻重。
A study of 16 dinosaur eggshell fossils in the Late Cretaceous from Xixia Basin, Henan Province, using microscopic and carbon isotope method has been made.
利用显微镜和碳同位素分析法对采自河南西峡盆地晚白垩世的16枚恐龙蛋化石进行了研究。
Red layer under the vast deposits of fossils. 1961 Guangdong Ou team mined by measuring the Late Cretaceous dinosaur fossils are very rare, is the world's best place to study dinosaurs.
红层下蕴藏着大量的古生物化石。1961年广东区测队采得的晚白垩纪恐龙化石非常珍贵，是全世界研究恐龙的最佳地方。
Red layer under the vast deposits of fossils. 1961 Guangdong Ou team mined by measuring the Late Cretaceous dinosaur fossils are very rare, is the world's best place to study dinosaurs.
红层下蕴藏着大量的古生物化石。1961年广东区测队采得的晚白垩纪恐龙化石非常珍贵，是全世界研究恐龙的最佳地方。
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