How long did it take for the bonebed to form?

骨床形成需要多长时间？

So the researchers think the asphalt actually seeped in after the bonebed was laid down.

所以研究人员认为沥青实际上是在骨床铺设后渗入的。

Like at the Danek Bonebed they are typically preserved in a mud stone, which tends to squish and distort the skeletons.

与 Danek Bonebed 一样，它们通常保存在泥石中，泥石往往会挤压和扭曲骨骼。

As a result, some species became almost staggeringly common: Mass bonebeds containing hundreds of metoposaurs have turned up in Africa, Europe and North America.

结果，一些物种变得几乎惊人地普遍：在非洲、欧洲和北美出现了包含数百只流龙的大型骨床。

Because each skeleton has many vertebrae and teeth, these elements are not very good ways to estimate a minimum number of individuals in a bonebed.

因为每个骨骼都有很多椎骨和牙齿，所以这些元素不是估计骨床中最小个体数量的好方法。

And the bonebed was formed in a marshy, aquatic environment - one that dried out from time to time, based on the plant remains that have been found there.

骨床是在沼泽、水生环境中形成的——根据在那里发现的植物遗骸，这个环境会不时干涸。

And we can see from pollen and isotopes found in ocean cores that the region of Ecuador where Tanque Loma is located dried out during the time period when the bonebed was forming.

而我们从海核中发现的花粉和同位素可以看出，Tanque Loma所在的厄瓜多尔地区在骨床形成的时间段内已经干涸。