
K-Pg Boundary Layer
66 million years ago
A Global Layer of Fallout
At sites across the world, geologists find the same narrow band rich in shocked minerals, soot, and iridium. This layer represents material lofted into the atmosphere when a roughly 10-to-12-kilometre-wide asteroid struck what is now the Yucatán Peninsula, throwing vaporised rock and dust around the planet before it settled out as a single line in the stratigraphic column.
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At sites across the world, geologists find the same narrow band rich in shocked minerals, soot, and iridium. This layer represents material lofted into the atmosphere when a roughly 10-to-12-kilometre-wide asteroid struck what is now the Yucatán Peninsula, throwing vaporised rock and dust around the planet before it settled out as a single line in the stratigraphic column.






























































