cretaceous

2 definitions • 5 examples

from or referring to the period of time between around 144 and 65 million years ago, in which plants with flowers first appeared:

the Cretaceous period

Cretaceous rocks

Sponges are often preserved inside flints, which were originally deposited as hard layers within the Cretaceous chalk.

the period between around 144 and 65 million years ago, in which plants with flowers first appeared:

In the Cretaceous, beetles and flies were the first pollinators.

Fossil remains from the Cretaceous are almost always found in sedimentary deposits.