K-T boundary

K–T boundary


Definition of K-T BOUNDARY

:  the transition between the Cretaceous and Tertiary periods of geologic time characterized by a mass extinction of many forms of life including the dinosaurs; also :  a geologic stratum marking this boundary

Origin of K-T BOUNDARY

K (alternative for C as abbreviation for Cretaceous) + Tertiary
First Known Use: 1983


Next Word in the Dictionary: k'thib
Previous Word in the Dictionary: K–T
All Words Near: K-T boundary

Seen & Heard

What made you want to look up K-T boundary? Please tell us where you read or heard it (including the quote, if possible).