将有机物质掺入白垩质土壤中将会降低碱性。
Incorporating organic material into chalky soils will reduce the alkalinity.
围绕索米尔的含白垩土壤出产著名的安茹葡萄酒。
The chalky soil around Saumur produces the famous Anjou wines.
他一再用白垩粉擦他的球杆尖。
因此，白垩孵化在春季和小群体中最常见。
Accordingly, chalkbrood is most common in spring and in small colonies.
这些动物在白垩纪对气候变化不像今天这样敏感。
These animals were not as sensitive to climate changes in the Cretaceous period as they are today.
科学家将白垩纪末期的大灭绝与地球上的陨石撞击联系起来。
Scientists have linked the mass extinction at the end of the Cretaceous with a meteorite impact on Earth.
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.
白垩纪以前的气候变化导致了海平面的剧烈波动，引发了恐龙的灭绝。
Changes in climate before the Cretaceous period caused severe fluctuation in sea level, resulting in the extinction of the dinosaurs.
地质记录显示，在白垩纪末期这些航道从大陆撤退，回到主要的海洋盆地。
At the end of the Cretaceous, the geological record shows that these seaways retreated from the continents back into the major ocean basins.
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.
在最后一层白垩纪岩石和第一层新生代岩石之间，常常有一层薄薄的粘土。
Between the last layer of Cretaceous rock and the first layer of Cenozoic rock, there is often a thin layer of clay.
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 very mild.
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。
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.
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.
Parpal dumplin首次发现于一个叫做克罗默浅滩白垩质河床的地方，它的发现是一个叫做“海洋研究”项目的一部分。
Parpal dumplin was first discovered in a place called the Cromer Shoal Chalk Beds as part of a project called Seasearch.
地质记录中的其他几次大规模物种灭绝也被认为影响重大，但没有哪一次像白垩纪大灭绝那样夸张。
Several other mass extinctions in the geological record have been tentatively identified with large impacts, but none is so dramatic as the Cretaceous event.
而并不是外太空或是白垩纪。
海底的沙子比白垩更白
覆盖白垩表的颗石藻将水面染成乳白色或者浅蓝色。
The chalky scales that cover coccolithophores color the water milky white or bright blue.
热河鸟-这种生物活在1亿2000万年前的白垩纪。
Jeholornis - this creature lived 120 million years ago in the Cretaceous.
尼德韦德兹克和司辛格的发现在杂志《白垩纪研究》上面发表了。
Niedzwiedzki and Singer's discovery was reported in the journal Cretaceous Research.
恐龙主宰世界的最后一个时期是白垩纪时代,之后就进入了古新代.
The Cretaceous—the last period when dinosaurs ruled the roost—was followed by the Palaeocene.
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.
人们已经得到了6500万年前白垩纪灭绝事件很好的证据。
So 65 million years ago they've got very good evidence of the cretaceous exctinction event.
科学家认为，在白垩纪，一连串的火山活动导致植物在海平面生长旺盛。
Scientists believe that during the Cretaceous period, a spate of volcanic activity caused plant life to bloom on the surface of the oceans.
这个发现对《白垩纪时期同时存在着大型鸟类和非鸟类恐龙》进行了证实。
The discovery confirms "that big birds were living alongside Cretaceous non-avian dinosaurs," lead author Darren Naish said.
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.
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.
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