Scientists have discovered levels of iridium 30 times greater than average in the Cretaceous/Tertiary (KT) boundary, the layer of sedimentary rock laid down at the time of the dinosaur extinction.
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Why Is The K–Pg Geological Boundary So Important?One of the ways that we know about this extraordinary event comes from what is known as the Cretaceous-Paleogene (K-Pg) boundary, formerly the Cretaceous-Tertiary (K-T) boundary. This geological ...
Yale graduate student Stephen Chester discovered the last known dinosaur before the catastrophic meteor impact 65 million years ago. Disclaimer: AAAS and EurekAlert! are not responsible for the ...
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