I think you're headed in the right direction...crater, cracks, uplifted land. Depending on the speed of said collision I would think that the debris field might go farther out and the crater might be larger...it looks more an asteroid hit the land rather than a big continent. Something that large might well destroy the planet but, like I said, if it was a rather slow collision then maybe not. If the continent was like, levitated then moved and set back down somewhere else then the oceans would rush in to fill the hole and then putting it back down somewhere might not really disturb the land that much at all, except river flows. In this case you could ignore the river police Give us a bit more of your thinking but I think you're headed in the right way overall.