“…Thus, well-known examples from the North York Moors (Erdtman, 1928;Simmons and Cundill, 1974;Simmons et al, 1975;Innes 1988a, 1988b) may be set alongside those from the southern Pennines (Tallis and McGuire, 1972), Wales (Wiltshire and Moore, 1983), Scotland (Knox, 1954;Durno and McVean, 1959;Birks and Madsen, 1979;, Carter, 1986) and Northern Ireland (McGreal and Larmour 1979; Hirons and Smith, 1986). Smith and Hirons (1986) considered the geomorphological implications of mineral layers in valley and blanket peats from the Mourne Mountains, Northern Ireland, and suggested that these layers were formed as a response to the effect of environmental changes on a potentially unstable store of debris on the valley slopes above the mire.…”