GLACIAL DEPOSITIONAL FEATURES

Landform	Identification Criteria	Boundary Defined by	Significance
Ice-scoured bedrock	Widespread exposures of bare bedrock with smooth striated or plucked upper surfaces	Outermost extent of bare bedrock	Evidence of glacier Ice at its Pressure-melting point
Drift Limit	the edge of the cover of a glacigenic deposit that is not also marked by a moraine ridge. Drift limit may be identified by a change in vegetation type or by change in the density of glacially deposited boulders	Outermost extent of Glacigenic deposit	Drift limit marks the extent oa a glacier advance
Moraine Ridge	A single ridge or collection of ridges composed of glacigenic material. Typically 1-10m (but exceptionally 100 m) in height. Sharp or rounded crests and either liner, curved, sinuous or sawtooth in plan	Lower concave break of Slope. The crestline orientation can also be recorded if this is well-defined	Moraine ridge marks the lateral or terminal extent of a glacier advance (except in the case of hummocky moraine)
Hummocky moraine	A seemingly chaotic assemblage of irregular hummocks and hollow. Hummocky moraine often shows order when viewed on aerial photographs or when mapped in detail in field	Outermost extent of Hummocky moraine. The crestline orientations of indivitual hummocks can be recorded if the scale of the map permits	Formed by the slow melting of stagnant debris-covered ice by deposition at receding glacier margins or the release of material from proglacial or englacial thrusts
Fluted moraine	Groups of straight elongated ridges of glacigenic material. Typically 10-100 m in length and 1 m wide	Upper Convex and lower Cncave breaks of slope of indivitual features (where scale permits)	Subglacial modification of sediment. Flutes are formed parallel to the direction of ice flow
Till sheet	A cover of glacigenic materal with no surface form or expresssion. Often associated with isolated boulders and bounded by a drift limit or moraine ridge	Outermost extent of glacigenic material	Extent of till sheet marks the extent of a glacier ice
Drumlins	Smooth, Streamlined, Oval-shaped or elliptical hills with steep or blunt stoss (up-ice) faces. Composed of a variety of gacigenic sediments . Typically 5-50m high and 10-3000m long, with length-to-width ratios of less than 50. Occur in Swarms	Upper convex and lower concave breaks of slope (where scale permits)	Widespread subglacial modifiaction of sedimet. The steeper, blunt end usually indicated the up-ice face
Kame terraces	Flat Topped Terrace along valley sides. Typically up to 10m in height. Usually composed of sand and gravel. Steep slopes commonly represent former ice-contact slopes. Upper Surface may be pock-marked by kettle holes	Upper Convex break of slope. Similar terrace heights can be indicated by distinctive shadings and patterns	Formed by the slow melting of stagnant debris-covered ice by deposition at receding glacier margins or the release of material from proglacial or englacial thrusts
Kame	Sub-conical hills of segments of flat topped terraces up-to 10 m in height. Usually composed of sand and gravel. Steep slopes commonly represent former ice-contact slopes	Upper Convex break of slope. Crestline orientations of indivitual kame segments can also be recorded if the feature is discontinuous	Fragmentary features, formed in a similar manner to kame terraces, but often in ice-walled tunnels against steep valley sides or in front of a glacier
Esker	Usually sinuous in plan and composed of sand and gravel. Some eskers are single crested, whilst others are braided in plan. Eskers can climb uphill or cross low cols.	Upper convex and lower concave breaks of slope. Crestline orientations of indivitual esker segments can also be recorded if the feature is discontinuos	Glacio-fluvial landforms created by the flow of meltwater in subglacial, englacial or supraglacial channels
Meltwater Channels	Channels cut in rock or sediment often with abrupt inception and termination and lack of modern catchment. Subglacial meltwater channels may breach cols, displaying convex-up long profile	Thalweg of channel, location of channel inception and termination. Arrow to indicate direction of former drainage can also be recorded if known	Evidence of former meltwater discharge route
Trimline	Line seperating areas of solifluction from extensive gullying or areas of mountain-top detritus/ weathered materal from upper limit of ice-scoured bedrock	Loer limit of solifluction or weathering and upper limit of extensive gullying or ice-scoured bedrock	Former Vertical dimensions of a glacial or englacial thermal boundary