String bog

A string bog or string mire is a bog consisting of slightly elevated ridges and islands, with woody plants, alternating with flat, wet sedge mat areas.

String bogs occur on slightly sloping surfaces, with the ridges at right angles to the direction of water flow.

[1] A string bog has a pattern of narrow (2–3m wide), low (less than 1m high) ridges oriented at right angles to the direction of drainage with wet depressions or pools occurring between the ridges.

The active layer exists as frozen ground for long periods and melts in the spring thaw.

Slow melting results in characteristic mass movement processes and features associated with specific periglacial environments.