Fraczek modeled the gradual change in the planet's geography that would happen as Earth slowed to a halt. As the spin stopped, the oceans would all fall back toward the poles, drowning everything north of Chicago and south of Buenos Aires and creating two massive circumpolar oceans. Wrapped around the middle of the planet would be a single equatorial megacontinent, with giant dry valleys where the old Atlantic and Pacific used to be. The immobile planet would be a perfect, if somewhat mountainous, sphere.