Across the [KT] boundary, you get into much more pure mantle-derived magmas—magmas that haven’t consumed a bunch of crustal material.” Lava flow on Hawaii. Image Credit: Wikimedia ...

Then several months later my radio came to the rescue. I was listening to Radio 4 "In Our Time" on the K T Boundary debate.( a catastrophic event which took place 65 million years ago) This was it.

Ranging in size from large chunks to tiny beads, impact ejecta are common at or near the Cretaceous/Tertiary (KT) boundary, the geological layer that defines the dinosaur extinction.

“The original studies of the clay layer found at the K-T boundary assumed much or all of this layer was derived from fine impact dust,” he said. “More recent studies of this layer have shown ...

In 2013, Renne and his team at the Berkeley Geochronology Center and elsewhere also dated the KT boundary extinction and dust from the impact and found they occurred within less than 32,000 years ...

It's the first known graveyard associated with the apocalyptic event, called the K-T boundary. By David Grossman Published: Apr 01, 2019 2:07 PM EDT. Robert DePalma.

Until now, paleontologists were unable to find any dinosaur fossils in the three meters below the KT boundary, which is the point where the meteor hit Earth.

Melvyn Bragg and guests discuss the KT Boundary. Across the entire planet, where it hasn't been eroded or destroyed in land movements, there is a thin grey line.

Ranging in size from large chunks to tiny beads, impact ejecta are common at or near the Cretaceous/Tertiary (KT) boundary, the geological layer that defines the dinosaur extinction.

The conventional theory about K-T impact dust is that it obscured the sun, shut down photosynthesis, and snuffed out life. Kevin Pope from Geo Eco Arc Research shows in the February issue of ...