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The rocks here are littered with this abundance of Jurassic sealife, but it doesn't last.
這里的巖石布滿了侏羅紀海洋生物資源，但它并不是連續的
Further up the cliff there's a black layer and here the fossils just disappear.
在這片遠離懸崖的黑色地層中，化石突然間不見了
As you can see, as you work your way up through here
正如你看到的，如果你鑿開這個地方
and we get quite a dramatic change at this point here
你會在這一點上發現戲劇性的變化
and all that seafloor life is gone, it's just disappeared completely.
所有海底生物都不見了，它們完全消失了
80% of life in the oceans had vanished.
80%的海洋生物消失了
Everything seemed to have died out and all over the world the same rocks recorded the same catastrophe.
所有生物似乎都滅絕了，全世界各地都有同樣的巖層記錄著同樣的災難
This layer which we see here on the Yorkshire coast, we can trace that throughout the world.
我們在約克郡海岸看到的這些地層，實際上在全世界各地都有
If we go to places in North America or the Himalayas or something like that,
如果我們跑到北美洲或是喜馬拉雅，或是其它什么地方
then we can see that rocks the same age have, have the same event in them.
我們可以看到同時期的巖層也記錄著同樣的事件
It's this very sharp event and it just records this mass death in the Jurassic.
這是一次劇烈事件，它記錄了侏羅紀的這次大滅絕
Just before the crucial mid-Jurassic period there had been a mass extinction
就在中侏羅世時期開始之前，地球上發生了一場大滅絕
and it seemed that a massive event such as the splitting apart of the super-continent had to have been responsible.
起因很有可能是超大陸分裂這樣的大事件
It was one of the most violent periods in the Earth's history.
它是地球史上最暴虐的時期之一。
