When you look at the image you can't help but think how it would look like if a giant ball of water was dropped like this on the surface. Apart from the flood / water destroying / reshaping the surface of the entire continent, anyone has an idea how it would the impact look like?

I am probably way off, but I imagine solid ice sinking deep into the ground with water starting to turn into vapor in the upper layers and the vapor generated inside exploding out from the ball as it gradually shrinks and deforms.