From 135 million to 63 million years ago; end of the age of reptiles; appearance of modern insects and flowering plants.
1
The hard siliceous mineral had been torn loose from chalk deposits laid down during the cretaceous period.
2
Dinosaurs had died out in the Cretaceous period, sixty-five million years ago.
3
This species roamed what is now Central Asia during the Cretaceous period.
4
And thirdly, during the Cretaceous period, it was once covered by swamps.
5
In the Cretaceous Period, much of this part of the country was underwater.
6
They proliferated throughout the Jurassic and the Cretaceous periods that followed.
7
Now they were facing something out of the Cretaceous period.
8
The idea for a Judicial Council dates from the political equivalent of the Cretaceous period.
9
The lemurs or half-apes are the stem-group, descending from the older Mallotheria of the Cretaceous period.
10
It's a Lissodus from the Upper Cretaceous period.
11
All other members of the order became extinct 60 million years ago, in the late Cretaceous period.
12
During the Cretaceous period, several species in the Maniraptoran group evolved different characteristics, based on their environment.
13
When the great mountain building took place during the Cretaceous Period, seaways drained and swamps dried up.
14
If we ever find a penguin fossil from the Cretaceous period, we'll know for sure, Dr Scofield said.
15
Some of the tuffs may be of the Jurassic age, though the Cretaceous period is also largely represented.
16
Eastern America, it may be recalled, is much higher than western until the close of the Cretaceous period.