Wiktionary
k-t boundary
alt. The geological signature of the transition between the Cretaceous period and the Tertiary period 65.5 million years ago.
This transition is marked worldwide by a layer of material that contains a high level of iridium. n. The geological signature of the transition between the Cretaceous period and the Tertiary period 65.5 million years ago.
This transition is marked worldwide by a layer of material that contains a high level of iridium.
Usage examples of "k-t boundary".
So that all of these perfectly preserved corpses ended up literally sitting on the K-T boundary.
The mass extinction at the K-T Boundary will seem minuscule by comparison.