What marks the boundary between the Mesozoic and the Cenozoic called the K-P boundary)?
A) the extinction of the dinosaurs
B) the start of a rise to dominance of mammals
C) a meteorite impact in Mexico
D) all of these
E) none of these

Question

Quizplus · Accepted Answer

The K-Pg (Cretaceous-Paleogene) boundary marks the end of the Mesozoic Era and the beginning of the Cenozoic Era, characterized by the extinction of the dinosaurs, the rise of mammals to dominance, and evidence of a significant meteorite impact in what is now Mexico, all contributing to a major transition in Earth's biological and geological history.

What Marks the Boundary Between the Mesozoic and the Cenozoic