Via Natural Resources Canada comes a gorgeously detailed geological map of the Arctic, served up hot and fresh for all your wallpaper needs.
You can download the massive, original, 27MB-map here, along all the accompanying charts, legends, etc. Below is a browser-friendlier version of the entire map, which you can download by clicking expand. Below that you'll find sections of the map cropped to some common aspect ratios. For more of our favorite geologic maps, see here, here, and here. If you're into this sort of thing and you've got an afternoon to spare, I highly recommend visiting the Lunar and Planetary Institute's Lunar Map Catalogue.