鱼龙化石

当这些因素存在时，某些地区就会变成一个充满保存完好的鱼龙化石的宝库。

Given these factors , some areas have become a treasury of well-preserved ichthyosaur fossils .

人们在黑色的、含沥青的海洋页岩中发现了约19000年前沉积下来的鱼龙化石。

The ichthyosaur remains are found in black , bituminous marine shales deposited about 190 million years ago .

它们的保存质量非常的好，但更令人称奇的是保存下来的育有胚胎的鱼龙化石数目。

The quality of preservation is outstanding , but what is even more impressive is the number of ichthyosaur fossils containing preserved embryos .

在获尔兹梅登附近一个小地区的六个不同的页岩层中分别发现了育有胚胎的鱼龙化石。这表明大量的鱼龙经年累月重复使用一个特定的地点。

Ichthyosaurs with embryos have been reported from 6 different levels of the shale in a small area around Holzmaden , suggesting that a specific site was used by large numbers of ichthyosaurs repeatedly over time .