Which feature is one of the pieces of evidence that indicates that the boundary between the Cretaceous Period and the Tertiary was marked by the impact of a large meteorite (bolide)?

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The iridium anomaly is a layer of sedimentary rock that contains an abnormally high amount of the element iridium. This is one of the strongest pieces of evidence that supports the idea of a large meteorite impact at the end of the Cretaceous Period, as iridium is abundant in meteorites but rare in Earth's crust.

Which Feature Is One of the Pieces of Evidence That