This comes with thanks to Pyrandon's city tutorial and Ascension's atlas tutorial. Haven't named the world yet, but I had a great time with Wikipedia's Alternative Place Names category.
The quick story is, this continent roughly looked like Europe until 300 years ago, when a massive magical event blew a crater just north of the island of Arke. A rough ring of mountains marks where the land was deformed out of the crater, and of course the ocean filled the hole nicely.
I'm in process of writing the campaign up. This forum has been a huge help getting me over the hump of starting to make my own maps. Thanks!

