It was the sudden rapid movement of the Cocos plate and the accompanying earthquakes and volcanism, not the limited nuclear exchanges that took place around that time, that made the Earth uninhabitable and forced humankind to abandon its birth planet. Nevertheless, all human emigrants carried with them the story that human actions had caused the destruction of the world.

MOUNTAINS

The gornaya (GOR-na-ya) is the great central massif lifted by the surging of the Cocos plate, with perpetually snow-covered peaks that are higher than any oxygen-breather can climb. Because most peaks are constantly invisible in clouds, they are not used as landmarks and are almost never named. Instead, rivers and lakes are used as landmarks, with their deep valleys forming both the highways and the habitats. The border of the gornaya was determined, before the return of the humans, by the lowest elevation where the digger/angel symbiosis could survive.

SEAS

Because the folding of the land into the ranges of the gornaya left most ranges running southeast to northwest, the rivers also run in those directions. This, rather than sunrise, the north star, or magnetic north, determined the cardinal directions of the diggers and angels (they had no compasses and even on clear days could rarely see the north star and could see sunrise or sunset only at the edges of the gornaya). Thus "north" in the names of various places means northwest of the gornaya, "west" means southwest, "south" means southeast, and "east" means northeast.

North Sea-the remnant of the Gulf of Mexieo, a narrow sea jammed between the Texas/Veracruz coast on one side and the Yucatan coast on the other.

East Sea (Gulf of Florida)-a new sea opened in the straits between Cuba and Florida by the new rotation and northeastward movement of the Appalachian plate.