- subglacial till
- Till deposited beneath, in, or by the bottom part of a glacier or ice sheet; subglacial till types include lodgment till, subglacial flow till, and subglacial melt-out till.SW & GM
Glossary of landform and geologic terms. 2013.
subglacial till
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Till — glaciar comenzando a ser poblado por pastos … Wikipedia Español
Till — is unsorted glacial sediment. Glacial drift is a general term for the coarsely graded and extremely heterogeneous sediments of glacial origin. Glacial till is that part of glacial drift which was deposited directly by the glacier. It may vary… … Wikipedia
till — [ glacial ] Dominantly unsorted and unstratified drift, generally unconsolidated and deposited directly by a glacier without subsequent reworking by meltwater, and consisting of a heterogeneous mixture of clay, silt, sand, gravel, stones,… … Glossary of landform and geologic terms
subglacial — a) Formed or accumulated in or by the bottom parts of a glacier or ice sheet; said of meltwater streams, till, moraine, etc. b) Pertaining to the area immediately beneath a glacier, as subglacial eruption or subglacial drainage. GG … Glossary of landform and geologic terms
supraglacial till — Till deposited on top of or within the upper part of a glacier or ice sheet. Melting of glacial ice deposits supraglacial till atop subjacent material, which forms topographic highs on a resultant landscape. Supraglacial till types include… … Glossary of landform and geologic terms
subglacial flow till — refer to flow till … Glossary of landform and geologic terms
subglacial melt-out till — refer to melt out till … Glossary of landform and geologic terms
flow till — A till that may be either subglacial or supraglacial in origin. Flow till displays secondary transport, sorting, and/or fabric modification by plastic mass flow. Flow till exhibits weak stratification and sorting and may contain distorted… … Glossary of landform and geologic terms
melt-out till — A till that may be either subglacial or supraglacial in origin. Melt out till forms by slow melting of debris rich stagnant ice, but without secondary flow processes. The fabric and clast orientations, imparted by ice processes, remain mostly… … Glossary of landform and geologic terms
lodgment till — A subglacial till deposited by an active glacier (flowing ice) commonly characterized by dense, fissile (“platy”) structure and containing rock fragments with their long axes oriented generally parallel to the direction of ice flow. Local… … Glossary of landform and geologic terms
