Here's a question: Might vs Time. I'll use Logos as an example: We can use might to raise mountains, continents, and so forth. And we can probably do so quite suddenly for super dramatic effect.
Logos controls gravity (among others), and you can substitute any god with their power for a similar scenario. What's to prevent him from grabbing alot of the base material from space, using his power to mold them into a hole, set it into an orbit, and then just lob a few more meteors into it to make the terrain. Heck, like Jan said a few icy meteors could result in oceans. But what if this is done over millions/billions of years rather than "shazam"?