A large hummock or ridge of ice lay in front of the man, blocking his view of the horizon in that direction.
Despite some burning in the past, the surface has an extremely high Sphagnum moss cover and a notable Sphagnum moss hummock development.
Some hours later the Phoenix landed on a low hummock amidst the swamps of the northeastern corner of Roister Island.
The bog surface is permanently wet and supports a dense and diverse cover of sphagnum bog-mosses including the rare hummock forming moss Sphagnum imbricatum.
The bog surface is permanently wet and supports a dense and diverse cover of Sphagnum bog-mosses including the rare hummock forming moss Sphagnum imbricatum.
The intact dome has characteristic vegetation and structural features, including hummock and lawn complexes and small shallow pools.
There are a score of fresh-water ponds, the largest being Hummock (320 acres).
These include shallow pools and a well-developed hummock and lawn complex.
These tend to merge into an enlarging, horseshoe-shaped bare slope which may threaten to reduce the dune to an eroded hummock.