K-T Extinction Evidence

The K-T Extinction is supported by 3 pieces of evidence. According to the EarthViewer app, the crater caused by the impact of the 10 km-diameter asteroid was identified in the Yucatán Peninsula of Mexico. This evidence proves the K-T extinction because there it is physical evidence that exists from the mass extinction event. Additionally, "Fossil Data by Era and Period" shows that during the Cretaceous period, there was evidence of a diversity of dinosaurs from the fossils. However, during the Tertiary period, there was no evidence of dinosaurs, seemingly nonexistent. This is another piece of evidence because the K-T extinction happened at the end of the Cretaceous period and the beginning of the Tertiary period. The Tertiary period wouldn't

have contained any evidence of the dinosaurs, as they became extinct during the K-T extinction. Finally, "Data on Global Temperature" shows that in during most of the Cretaceous period and the entirety of the Tertiary period, the temperature was ~22°C (~72°F). This final piece of evidence proves the K-T extinction, as the asteroid was traveling at extreme speeds. When the asteroid made impact on the Earth, it caused superheating, which resulted in temperatures to increase rapidly. In conclusion, these pieces of evidence show that the K-T extinction was an occurrence in our history.