Tufts are small, fist-wise fingers of earth sticking up from through the black water covering the world in The Sundered. They tend to exist in clusters, making those areas very unsafe for Travelers and others who use boats.
He straddles the black water, each boot on a different tuft, standing with the easy balance we all must learn or else we die. “There’s something over there!” I hate the tufts— knobs of land sticking out of the water, covered with limp grass like dirty hair. If there are a lot of them, we have to carry the boats.