K/T extinction event facts for kids
The Cretaceous–Tertiary extinction event, or Cretaceous–Palaeogene extinction event, was about 66 million years ago. It may be called the K/T extinction event or even K/Pg event for short. This is the famous event which killed the dinosaurs at the end of the Cretaceous period.
Dinosaur fossils are only found below the K/T boundary. This shows they became extinct before, or during the event. Mosasaurs, plesiosaurs, pterosaurs and many species of plants and invertebrates also became extinct.
Several impact craters and massive volcanic activity, such as that in the Deccan Traps in India, have been dated to the approximate time of the extinction event. These geological events would have reduced sunlight and hindered photosynthesis, leading to a massive disruption in Earth's ecology.
Evidence is accumulating that there were multiple impacts across the Cretaceous/Tertiary boundary, such as the Chicxulub crater in Mexico, Boltysh crater in Ukraine, Silverpit crater in North Sea, and the Shiva crater offshore western India. The Shiva crater is a sea floor structure under the continental shelf in the Indian Ocean, west of Mumbai, India. It was named by paleontologist Sankar Chatterjee after Shiva, the Hindu god of destruction and renewal.
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