Glacier massive balance | Glacier circulation | internal deformation | Basal sliding | Subglacial deformation | Different varieties of glacier circulation | recommendations | comments |

Glacier massive balance


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Boulder pavement at Whitburn Bay, ar Durham. The boulders represent an erosional surface between two glacial tills.

You are watching: Is one of the two major flow mechanisms in a glacier

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Carboniferous limestone boulder in till at Whitburn Bay. The boulder is shame by glacial erosion and also scratched by call with other rocks and ice.
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Channel the sand and also gravel deposit at the ice-bed interface.
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Two tills rest on optimal of Magnesian Limestone bedrock at Whitburn Bay, overlain by deformed glaciofluvial sands (sands deposit by a proglacial river). Keep in mind the large, faceted boulders in ~ the boundary between the two tills.
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Folded and deformed sands overlying glacial till in ~ Whitburn Bay, county Durham.
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This sand was deposited in former of the glacier (proglacial), however then overridden by the ice.
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Complexly interbedded, folded and deformed sands in center Pleistocene sediments at Warren home Gill.
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Deformed and faulted chalk clasts in middle Pleistocene glacial tills in phibìc Norfolk, indicating brittle deformation.
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Soft chalk clasts have actually been strectched and folded here in north Norfolk by glacial processes.
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Rafts that chalk have been thrust increase on peak of one one more within glaciotectonised sediments in north Norfolk

Different types of glacier flow

Glaciers perform not just flow in a stable state, however. We have actually cold-based glaciers, which have small flow velocity; polythermal glaciers, i m sorry are partly frozen to your bed; wet-based glaciers which have sheet flow (as is defined in the over sections); ice streams, i m sorry have really rapid circulation velocities; and also surging glaciers, which have periods that rapid circulation separated by quiescent periods of sluggish flow. The vital differences in temperate glacier circulation is summarised in the table below. Each of these various flow regimes results in a set of different and also diagnostic glacial landforms.

Further Reading

Other sources:

Go to peak or run to Glacier thermal regime.
Davies, B.J., Roberts, D.H., Bridgland, D.R., and also Ó Cofaigh, C., 2012a. Dynamic Devensian ice flow in NE England: a sedimentological reconstruction. Boreas, 2012. 41: p. 337-366.

Davies, B.J., Roberts, D.H., Bridgland, D.R., Ó Cofaigh, C., Riding, J.B., Demarchi, B., Penkman, K., and also Pawley, S.M., 2012b. Timing and also depositional atmospheres of a middle Pleistocene glaciation the northeast England: new evidence native Warren residence Gill, ar Durham. Quaternary science Reviews, 2012. 44: p. 180-212.

Davies, B.J., Roberts, D.H., Bridgland, D.R., Ó Cofaigh, C., Riding, J.B., Phillips, E.R., and also Teasdale, D.A., 2009. Interlobate ice cream sheet dynamics during the critical Glacial Maximum in ~ Whitburn Bay, county Durham, England. Boreas, 2009. 38: p. 555-575.

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Jiskoot, H., Dynamics that Glaciers, in Encyclopedia the snow, ice and also glaciers, V.P. Singh, P. Singh, and also U.K. Haritashya, Editors. 2011, Springer: Dordrecht, The Netherlands. P. 245-256.