The group originated probably somewhat earlier, but a Cretaceous age - maybe about 110 million years ago or so - is likely.

The next oldest rocks are of Cretaceous age and include:

Amber is globally distributed, mainly in rocks of Cretaceous age or younger.

There we find depositions of sea floor deposits from the Cretaceous age.

There is some question about whether the fossils are from the late Jurassic or the early and mid Cretaceous age.

Formed during the Cretaceous age, they are highly deformed from uplift and folding processes.

On the following day we were driven further back in time; 80 million years, to be exact, to the Cretaceous age.

So, no obsidian is older than Cretaceous age.

Its upper strata is likely from the Lower or Middle Cretaceous age.

Fossils have been found of Early Cretaceous age from Brazil.