A region of land that is found in wet exposed conditions where the soil water can seep laterally very slowly but is not stagnant as in *bogs
. It has an acid peaty soil and common plant species found there include mat grass (Nardus stricta) and purple moor-grass (Molinia caerulea). The top soil loses water in summer but the subsoil is permanently waterlogged. The peat layer is rarely more than 30 cm deep and most of the plants have their roots in the mineral soil horizon.