The K-T Event is:
A) a catastrophic event that quickly cooled the Earth's climate resulting in the extinction of the dinosaurs.
B) a layer of iron and nickel deposits in shallow water off the Caribbean coast of Mexico.
C) associated with a time period in which amphibians evolved and colonized land.
D) the period during which tree ferns and large flowering plants dominated the landscape.
E) the start of a long period of global warming during which animals increased their terrestrial distribution to include all land masses.

Question

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The K-T Event, also known as the Cretaceous-Paleogene extinction event, is a catastrophic event that occurred approximately 66 million years ago. It is believed to have been caused by a massive asteroid impact that quickly cooled the Earth's climate, resulting in the extinction of the dinosaurs and about 75% of all plant and animal species on Earth at the time. The event is marked by a layer of sedimentary rock enriched in iridium, a rare element found in high levels in asteroids and meteorites. This layer of rock is found all over the world and serves as evidence for the impact theory of the K-T Event.

The K-T Event Is