Domain PV: plateau and valley

Plateau and valley domain ice limits.

This domain includes many of the uplands of England and south-east Wales.

The landscape is primarily determined by differential erosion of the bedrock, with weaker mudstones forming hollows and the more resistant sandstones and limestones giving rise to scarps. This topography was moulded by at least three glacial episodes; evidence for the earlier phases has been mostly obliterated by the Devensian glaciation, except perhaps in the southern Pennines. Many of the major valleys were originally glacially scoured but are now flat-bottomed, with a partial fill of complex glacigenic deposits overlain by alluvium.

The domain has a significant cover of superficial deposits (~32%) present across valleys and plateaux. Organic deposits form about 7% of the area (~22% of the area of superficial deposits).

Blanket peat is widespread on plateau surfaces, where deeply weathered bedrock is common. More localized development of peat may occur within poorly drained hollows associated with hummocky glacial deposits and glacial meltwater channels. Peat may also occur within the alluvial floodplains.

Mire classification (and guide to dominance within the domain)

Subjective guide to dominance within this domain Topogenous mires Soligenous mires Ombrogenous mires
Dominant     Blanket mire
Locally present Floodplain mire Valley mire

Spring mire

Raised mire
Rare Open water transition mire

Basin mire




For further information please contact Marieta Garcia-Bajo