AcrostiQuiz #3 by BringMoreLegos

Question 12

Scientists have hypothesized that an asteroid impact at Chicxulub on the Yucatan Peninsula approximately 65 million years ago caused the catastrophic extinction event between the Cretaceous and Paleogene (formerly Tertiary) periods. What ABBREVIATION is commonly used to identify the boundary of these two geological time periods? (Both the currently and formerly used terminology will be accepted.)

K-PG or K-T