[deniscepko2]

Can anyone explain how can it be 20 kilometers in depth and yet Mariana trench is the deepest place on earth 11km ?

[seanhunter]

The article says:

  > The Chicxulub crater is an impact crater buried underneath the Yucatán Peninsula in Mexico.

So I guess plate techtonics have caused things to shift around such that the crater isn't a hole in the surface now, but is underneath other rock?

[ppsreejith]

Fun fact: If you google "Chicxulub crater" you see an animation of an asteroid crashing.

[lofaszvanitt]

It was an impact crater. Over millions of years it was filled with sediment, so it's not that deep anymore.