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Durham University

Department of Geography

Departmental Research Projects

Publication details

Roberts, D.H. & Hart, J.K. The deforming bed characteristics of a stratified till assemblage in north East Anglia, UK: investigating controls on sediment rheology and strain signatures. Quaternary Science Reviews. 2005;24:123-140.

Author(s) from Durham

Abstract

The glacial coastal exposures of north Norfolk are a type site for subglacial glaciotectonic deforming bed sediments. This investigation of the lower stratified diamict within the North Sea Drift at West Runton reveals two distinct lamina types. Type 1 laminae are the product of primary extensional glaciotectonism, with ductile, intergranular pervasive shear predominating over brittle shear. Type 2 laminae also exhibit structures that can be attributed to ductile, intergranular pervasive shear and brittle shear, but the lateral continuity of Type 2 laminae and the presence of dropstone—like structures supports a primary subaqueous origin with secondary subglacial deformation.

When coupled with micromorphological analysis, these findings show that ductile, viscous creep mechanisms control sedimentary architecture, and that ‘shear stratification’ in particular, has the potential to affect the rheological properties of the sediment pile and the hydraulic routing of basal water, ultimately influencing critical effective pressure fluctuations and the thresholds controlling the subglacial drainage system.

References

Alley, R.B., Blakenship, D.D., Bentley, C.R., Rooney, S.T., 1987. Till
beneath Ice stream B. 3. Till deformation: evidence and implications.
Journal of Geophysical Research 92, 8921–8929.
Banham, P.H., 1968. A preliminary note on the Pleistocene
stratigraphy of northeast Norfolk. Proceedings of the Geologists
Association, London 108, 507–512.
Banham, P.H., 1977. Glaciotectonites in till stratigraphy. Boreas 6,
101–106.
Banham, P.H., 1988. Polyphase glaciotectonic deformation in the
contorted drift of Norfolk. In: Croot, D. (Ed.), Glaciotectonics:
Forms and Processes. Balkema, Rotterdam, pp. 27–32.
Benn, D.I., 1994. Fabric shape and the interpretation of sedimentary
fabric data. Journal of Sedimentary Research A64, 910–915.
Bennett, M.R., Waller, R.I., Glasser, N.F., Hambrey, M.J., Huddart,
D., 1999. Glacigenic clast fabrics: genetic fingerprint or wishful
thinking? Journal of Quaternary Science 14, 125–135.
Blakenship, D.D., Bentley, C.R., Rooney, S.T., Alley, R.B., 1987. Till
beneath Ice stream B. 1—Properties derived from seismic trail
times. Journal of Geophysical Research 92, 8903–8911.
Boulton, G.S., Caban, P.E., 1996. Groundwater flow beneath ice
sheets: Part II––its impact on glacier tectonic structures and
moraine formation. Quaternary Science Reviews 14, 563–587.
Boulton, G.S., Dobbie, K.E., 1993. Consolidation of sediments by
glaciers: relations between sediment geotechnics, soft-bed glacier
dynamics and subglacial ground-water flow. Journal of Glaciology
39, 26–44.
Boulton, G.S., Jones, A.S., 1979. Stability of temperate ice caps and ice
sheets resting on deformable sediment. Journal of Glaciology 24,
29–43.
Boulton, G.S., Hindmarsh, R.C.A., 1987. Sediment deformation
beneath glaciers: rheology and geological consequences. Journal
of Geophysical Research 92, 9059–9082.
Boulton, G.S., Dobbie, K.E., Zatespin, S., 2001. Sediment deformation
beneath glaciers and its coupling to the subglacial hydraulic
system. Quaternary International 86, 3–29.
Bowen, D.Q., McCabe, A.M., Rose, J., Sutherland, D., 1986.
Correlation of Quaternary Glaciations in England, Ireland, Scotland
and Wales. In: Sibrava, B., Bowen, D.Q., Richmond, G.M.
(Eds.), Quaternary Glaciations in the Northern Hemisphere.
International Geological Correlation Programme Project No. 24;
Quaternary Science Reviews 5, 199–340.
Carr, S., 1999. The micromorphology of Last Glacial Maximum
sediments in the Southern North Sea. Catena 35, 123–145.
Carr, S., 2001. Micromorphological criteria for discriminating
subglacial and glaciomarine sediments: evidence from a contemporary
tidewater glacier, spitsbergen. Quaternary International 86,
71–81.
Carr, S., Rose, J., 2003. Till fabric patterns and significance: particle
response to subglacial stress. Quaternary Science Reviews 22,
1415–1426.
Clark, P.U., 1994. Unstable behaviour of the Laurentide ice sheet over
deforming sediment and its implications for climate change.
Quaternary Research 41, 19–25.
Clark, P.U., 1995. Fast glacier flow over soft beds. Science 267, 43–81.
Clark, P.U., Walder, J.S., 1994. Subglacial drainage, eskers, and
deforming beds beneath the Laurentide and Eurasian ice sheets.
Geological Society of America Bulletin 106, 304–314.
Ehlers, J., Gibbard, P., 1991. Quaternary Glaciations—Extent and
Chronology, Vol. 1: Europe. Elsevier, Amsterdam.
Evans, D.J.A., Owen, L.A., Roberts, D.H., 1995. Stratigraphy and
sedimentology of Devensian Dimlington Stadial glacial deposits,
east Yorkshire, England. Journal of Quaternary Science 10,
241–265.
Eyles, N., Eyles, C.H., McCabe, A.M., 1989. Sedimentation in an icecontact
subaqueous setting: the mid-Pleistocene ‘‘North Sea
Drifts’’ of Norfolk, U.K. Quaternary Science Reviews 8, 57–74.
Fischer, U.H., Clarke, G.K.C., 1994. Stick-slip sliding behaviour at the
base of a glacier. Annals of Glaciology 24, 390–396.
Fischer, U.H., Clarke, G.K.C., 2001. Review of subglacial hydromechanical
coupling: Trapridge Glacier, Yukon Territory, Canada.
Quaternary International 86, 29–45.
Fish, P.R., Whiteman, C.A., Moorlock, B.S.P., Hamblin, R.J.O.,
Wilkinson, I.P., 2000. The glacial geology of the Weybourne area,
north Norfolk: a new approach. Bulletin of the Geological Society
of Norfolk 50, 21–45.
Fish, P.R., Whiteman, C.A., 2001. Chalk micropalaeontology and the
provenance of Middle Pleistocene Lowestoft Formation till in
eastern England. Earth Surface Processes and Landforms 26,
953–970.
Gravenor, C.P., 1985. Glacial tectonic and flow structures in
glaciogenic deposits: a cautionary note. Bulletin of the Geological
Society of Denmark 34, 3–11.
Hart, J.K., 1987. The genesis of north east Norfolk Drift. Unpublished
Ph.D. Thesis, University of East Anglia.
Hart, J.K., 1990. Proglacial glaciotectonic deformation and the origin
of the Cromer Ridge push moraine, north Norfolk, England.
Boreas 19, 165–180.
Hart, J.K., 1992. Sedimentary environments associated with Glacial
Lake Trimingham, Norfolk, U.K. Boreas 21, 119–136.
Hart, J.K., 1994. Till fabric associated with deformable beds. Earth
Surface Processes and Landforms 19, 15–32.
Hart, J.K., Boulton, G.S., 1991a. The glacial drifts of north-eastern
Norfolk. In: Ehlers, J., Gibbard, P.L., Rose, J. (Eds.), Glacial
Deposits in Great Britain and Ireland. Balkema, Rotterdam,
pp. 233–244.
Hart, J.K., Boulton, G.S., 1991b. The interrelationship between
glaciotectonic deformation and glaciodeposition. Quaternary
Science Reviews 10, 335–350.
Hart, J.K., Peglar, S., 1990. Further timing evidence for the Middle
Pleistocene glaciation of Britain. Proceedings of the Geological
Association 101, 187–196.
Hart, J.K., Roberts, D., 1994. Criteria to distinguish between
glaciotectonic and glaciomarine sedimentation: 1—deformational
styles and sedimentology. Sedimentary Geology 91, 191–213.
Hart, J.K., Hindmarsh, R.C.A., Boulton, G.S., 1990. Styles of
subglacial glaciotectonic deformation within the context of the
Anglian ice-sheet. Earth Surface Processes and Landforms 15,
227–241.
Hiemstra, J.F., van der Meer, J.J.M., 1997. Pore water controlled grain
fracturing as an indicator for subglacial shearing in tills. Journal of
Glaciology 43, 446–454.
Hindmarsh, R., 1997. Deforming bed: viscous and plastic scales of
deformation. Quaternary Science Reviews 16, 1039–1056.
Hooyer, T., Iverson, N., 2000. Diffusive mixing between shearing
granular materials: constraints on bed deformation from till
contacts. Journal of Glaciology 46, 641–651.
Iverson, N.R., Hanson, B., Hooke, R.L., Jansson, P., 1994. Flow
mechanism of glaciers on soft beds. Science 267, 80–81.
Iverson, N.R., Hooyer, T.S., Baker, R.W., 1995. Ring-shear studies of
till deformation: Coulomb-plastic behaviour and distributed strain
in glacier beds. Journal Glaciology 44, 634–642.
Iverson, N.R., Baker, R.B., Hooyer, T.S., 1997. A ring shear device for
the study of till deformation: tests on tills with contrasting clay
contents. Quaternary Science Reviews 16, 1057–1066.
Iverson, N.R., Hooyer, T.S., Baker, R.W., 1998. Ring-shear studies of
till deformation: Coulomb-plastic behaviour and distributed strain
in glacier beds. Journal of Glaciology 44, 634–642.
Iverson, N.R., Baker, R.W., Hooke, R.L., Hanson, B., Jansson, P.,
1999. Coupling between a glacier and a soft bed: I. A relation
between effective pressure and local sheer stress determined from
till elasticity. Journal of Glaciology 45, 31–40.
Kwatwa, A., Tulaczyk, S., 2001. Microstructural interpretations of
Modern and Pleistocene subglacially deformed sediments: the
relative role of parent material and subglacial processes. Journal of
Quaternary Science 16, 507–517.
Lee, J.R., 2001. Sedimentation and lithostratigraphy of the Corton
Diamicton (basal member of the North Sea Drift Formation), East
Anglia, UK. Proceedings of the Geologists’s Association 112,
43–67.
Lee, J.R., Rose, J., Riding, J.B., Hamblin, R.J.O., Moorlock, B.S.P.,
2002. Testing the case for a Middle Pleistocene Scandinavian
glaciation in Eastern England: evidence for a Scottish ice source for
tills within the Corton Formation of East Anglia, UK. Boreas 31,
345–355.
Lunnka, J.P., 1988. Sedimentation and deformation of the North Sea
Drift Formation in the Happisburgh area, north Norfolk. In:
Croot, D. (Ed.), Glaciotectonics: Forms and Processes. Balkema,
Rotterdam, pp. 109–122.
Lunkka, J.P., 1994. Sedimentation and lithostratigraphy of the North
Sea Drift and Lowestoft Till Formations in the coastal cliffs of
northeast Norfolk, England. Journal of Quaternary Science 9,
209–233.
MacAyeal, D.R., 1993. Binge/purge oscillations of the Laurentide Ice
Sheet as a cause of North Atlantic Heinrich Events. Palaeoceanography
8, 775–784.
Menzies, J., Maltman, A.J., 1992. Microstructures in diamictonsevidence
of subglacial bed conditions. Geomorphology 6, 27–40.
Menzies, J., Woodward, J., 1994. Preliminary study of subglacial
diamicton microstructures as reflected in drumlin sediments at
Chimney Bluffs, New York. In: Warren, W.P., Croot, D.G. (Eds.),
Formation and Deformation of Glacial Deposits. Balkema,
Rotterdam.
Menzies, J., van der Meer, J.J.M., 1998. Sedimentological and
micromorphological examination of a Late Devensian multiple
diamicton sequence near Monetdie, Perthshire, east-central Scotland.
Scottish Journal of Geology 34, 15–21.
Menzies, J., Zaniewski, K., Dreger, D., 1997. Evidence, from
microstructures, of deformable bed conditions within drumlins,
Chimney Bluffs, New York State. Sedimentary Geology 111,
161–175.
Murray, T., 1997. Assessing the paradigm shift: deformable glacier
beds. Quaternary Science Reviews 16, 995–1016.
Piotrowski, J.A., Hoffman, K., 1999. Ice-bed processes on a
deformable substratum inferred from short-travelled diamicton
melange at Amsdorf, Central Germany. Field Symposium on
Pleistocene Stratigraphy and Glacial Chronology in Tartu,
Estonia. INQUA Commission on Glaciation. The Peribaltic
Group. Abstracts 15–16.
Piotrowski, J.A., Tulaczyk, S., 1999. Subglacial conditions under
the last ice sheet in northwest Germany: ice-bed separation
and enhanced basal sliding? Quaternary Science Reviews 18,
737–751.
Piotrowski, J.A., Mickelson, D.A., Tulaczyk, S., Krzyszkowski, D.,
Junge, F.W., 2001. Were deforming subglacial beds beneath
past ice sheets really widespread? Quaternary International 86,
139–150.
Reid, C., 1882. The Geology of the country around Cromer. Memoirs
of the Geological Survey of England and Wales.
Roberts, D.H., 1995. The development of criteria to distinguish
glaciotectonic and glaciomarine sedimentary environments. Ph.D.
Thesis, University of Southampton.
Rose, J., Candy, I., Lee, J.R., 2000. Leet hill: pre-glacial and
glaciofluvial river deposits—with possible evidence for a major
glaciation prior to the deposition of the Lowestoft till. In: Lewis,
S.G., Whiteman, C.A., Preece, R.C. (Eds.), The Quaternary of
Norfolk and Suffolk. Quaternary Research Association Field
Guide. Quaternary Research Association, London, pp. 207–219.
Truffer, M., Harrison, W.D., Echelmeyer, K.A., 2000. Glacier motion
dominated by processes deep in underlying till. Journal of
Glaciology 46, 213–222.
Tulaczyk, S., 1999. Ice sliding over weak, fine-grained tills: dependence
of ice-till interactions on till granulometry. In: Mickelson, D.M.,
Attig, J.V. (Eds.), 1999. Glacial Processes Past and Present 337.
Geological Society of America Special paper, Boulder, CO,
pp. 159–177.
Tulaczyk, S., Kamb, B., Scherer, R., Engelhardt, H.F., 2000.
Sedimentary processes at the base of a west Antarctic ice stream:
constraints from textural and compositional properties of subglacial
debris. Journal of Sedimentary Research 68, 487–496.
van der Meer, J.J.M., 1993. Microscopic evidence of subglacial
deformation. Quaternary Science Reviews 12, 553–587.
van der Meer, J.J.M., 1997. Particle and aggregate mobility in till:
microscopic evidence of subglacial deformation. Quaternary
Science Reviews 16, 827–831.
Visser, J.N.J., 1983a. Submarine debris flow deposits from the Upper
Carboniferous Dwyka Tillite Formation in the Kalahari basin,
South Africa. Sedimentology 30, 523–551.
Visser, J.N.J., 1983b. The problems of recognising ancient subaqueous
debris flow deposits in glacial sequences. Transaction of the
Geological Society of South Africa 86, 127–135.
Visser, J.N.J., Colliston, W.P., Terblanche, J.C., 1984. The origin of
soft sediment deformation structures in the Permo-Carboniferous
glacial and proglacial beds, South Africa. Journal of Sedimentary
Petrology 54, 1183–1196.
Walder, J.S., Fowler, A., 1994. Channelised subglacial drainage over a
deformable bed. Journal of Glaciology 40, 3–15.
West, R.G., 1980. The pre-glacial Pleistocene of the Norfolk and
Suffolk coast. Cambridge University Press, England.

Department of Geography