Sentences with phrase «global layer»

Hörst says it's possible this bombardment has left MU69 covered in a global layer of the material.

If both caps are composed completely of water, the combined volumes are equivalent to a global layer 66 to 100 feet deep, about one third the minimum volume for the ancient seas of Mars.

Yet some species survived, and the global layer of impact debris doesn't contain as much soot as would be expected from burning the world's forests, raising questions about the extent of post-impact wildfires.

What's more, when Alvarez first proposed the asteroid theory, his principal piece of evidence was a global layer of iridium found exactly at the K / T boundary.

The study's authors speculate that exceptionally pure anorthosite may make up a global layer of the moon's crust from roughly three kilometers to 30 kilometers below the surface.

«This proves that there must be a global layer of liquid separating the surface from the core.»

For instance, the famous K - T event or K - T boundary, which marked the end of the Cretaceous period 65 million years ago, features a global layer of the element iridium in rock, the signature of a major asteroid impact.