Sea levels fluctuated but were in the most part high ... The UK's famous White Cliffs of Dover are just one of many Late Cretaceous chalk deposits. Chalk is laid down in marine environments, and the ...

Thick layers of sediment built up at the bottom of these seas as single-celled algae died and their skeletons fell to the seabed. This is how most of the chalk we use today was first formed. So much ...

and sandpipers all show up in the Cretaceous. In the warm, shallow seas that spilled onto the continents, the long-necked plesiosaurs gave way to the giant, snakelike mosasaurs. Rays and modern ...

While splitting a piece of chalk, he noticed unusual fragments ... between predators and prey and the food chains in the Cretaceous Sea," he added. Experts believe that the vomit is composed ...

The pile of 66-million-year-old, fossilized, regurgitated sea lilies was dated to the Cretaceous era ... and the organisms’ structures included chalk-like portions that were often regurgitated ...

For most of the Cretaceous, Canada’s prairie provinces were sitting deep underwater. A giant inland sea cut right across North America. Known as the Western Interior Seaway, it ran north to ...

A Danish fossil hunter discovered a 66-million-year-old chunk of fossilised vomit, likely from a fish that couldn't digest sea lilies.

"This chalk is about 80 to 90 million years old and was formed at the bottom of the sea during the Cretaceous period. "So when this sea urchin was alive at the bottom of the warm shallow sea where ...