The K-T boundary refers to
A) the boundary between ejecta and the crater floor.
B) the boundary at the abrupt onset on the Younger drays cold episode.
C) a mass extinction event caused by volcanic activity.
D) a mass extinction event caused by a change in plate movements.
E) an extinction that coincides with the end of the Cretaceous Period.

Question

Quizplus · Accepted Answer

The K-T boundary refers to the boundary between the Cretaceous and Tertiary periods, which corresponds with a mass extinction event that marks the end of the dinosaurs and many other species.

The K-T Boundary Refers to