The K–Pg boundary is associated with the Cretaceous–Paleogene extinction event, a mass extinction which destroyed a majority of the world's Mesozoic species, including all dinosaurs except for birds.[4]
Strong evidence exists that the extinction coincided with a large meteorite impact at the Chicxulub crater and the generally accepted scientific theory is that this impact triggered the extinction event.
The word "Cretaceous" is derived from the Latin "creta" (chalk). It is abbreviated K (as in "K-Pg boundary") for its German translation "Kreide" (chalk).[5]
