Iridium was the element that first alerted us to the unusual dust left behind by the K-Tboundary event.

Question

Quizplus · Accepted Answer

This statement is true. Iridium, an element rare on Earth but common in asteroids and meteors, was found in high concentrations in the clay layer deposited at the K-T boundary, providing evidence for a catastrophic impact event. This statement is true. The discovery of high levels of iridium in the sediment layer at the K-T boundary provided evidence for a catastrophic event such as a meteorite impact.

Iridium Was the Element That First Alerted Us to the Unusual