These animals were not as sensitive to climate changes in the Cretaceous period as they are today.

这些动物在白垩纪对气候变化不像今天这样敏感。

youdao

In Australia, this happened about 60 million years ago in the Cretaceous Period.

在澳洲，约60万多年前发生在白垩纪。

youdao

The prehistoric reptile lived in the cretaceous period about125million years ago.

这只史前爬行动物生活在约一亿两千五百万年前的白垩纪。

youdao

Scientists say it formed when high sea levels flooded the middle of North America, splitting the continent in two for millions of years during the late Cretaceous period.

VOA: special.2010.10.05

The Tyrannosaurus lived in North America during the late Cretaceous Period.

VOA: special.2009.09.01

My piece is set in the late Cretaceous period, 65 million years ago (give or take a few).

FORBES: Prototyping The Distant Future

Its detection at unearthly levels in rocks 65 million years old was the first evidence in the case for an asteroid causing the mass extinction and global environmental mayhem that ended the Cretaceous period and began the Tertiary period.

BBC: Leaving our mark: Fossils of the future

The moment most people were persuaded that the dinosaurs were killed by an impact was when the crater in Mexico was shown to have been created 65m years ago, at the end of the Cretaceous period.

ECONOMIST: Some new ideas about why life on Earth has periodic crises