Abstract
Diamicton-dominated shelf glacigenic sequences are characterized on high-resolution seismic records by a structureless to chaotic acoustic texture, often with abundant hyperbolic (point-source) reflections. Existing depositional models, based primarily on seismic data, have been constructed on the basis that this acoustic signature is indicative of subglacial till. However, borehole data from the UK continental shelf indicate that glaciomarine facies are also present. Thus, while this acoustic character may be indicative of diamicton lithofacies, it should not be taken as a predictive genetic indicator of a specific depositional process.
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Eyles N, Eyles CH, Miall AD (1983) Lithofacies types and vertical profile models: An alternative approach to the description and environmental interpretation of glacial diamict and diamictile sequences. Sedimentology 30:393–410
Eyles N, Eyles CH, McCabe AM (1989) Sedimentation in an icecontact subaqueous setting: The Mid-Pleistocene ‘North Sea Drifts’ of Norfolk, U.K. Quaternary Science Reviews 8:57–74
Frakes LA (1978) Diamictite. In: Fairbridge RW, Bourgeois J (eds) The Encyclopedia of Sedimentology. Dowden, Hutchinson and Ross, Stroudsberg, PA, pp 262–263
Holmes R (1977) Quaternary deposits of the central North Sea. 5. The Quaternary geology of the UK sector of the North Sea between 56°N and 58°N. Report Institute Geological Sciences. No. 77/14, 50 pp
Ingolfsson O (1987) The Late Weichselian glacial geology of the Melabakkar-Asbakkar coastal clifs, Borgafjordur. W-Iceland. Jokull 37:59–81
Josenhans HW, Fader GBJ (1989) A comparison of models of glacial sedimentation along the eastern Canadian margin. Marine Geology 85:273–300
King LH, Fader GBJ (1986) Wisconsinan glaciation of the Atlantic continental shelf of southerast Canada. Bulletin Geological Survey. Canada, v. 363, 72 pp
King LH, Rokoengen K. Gunleiksrud T (1987) Quaternary seismostratigraphy of the mid Norwegian shelf. 65°–67°30′N.—A till tongue stratigraphy. Institutt for kontinentalsokkelundersokelser og petroleumsteknologi A/S. Publication 114, 58 pp
Laban C, Cameron TDJ, Schuttenhelm RTE (1984) Geologie van het Kwartair van de zuidelijke bocht van de Noordzee. Mededelingen Werkgroep voor Tertiair Kwartair Geologie 21:139–154
Mitchum RM Jr, Vail PR, Sangree JB (1977) Seismic stratigraphy and global changes of sea level. Part 6: Stratigraphic interpretation of seismic reflection patterns in depositional sequences. In: Payton C (ed) Seismic Stratigraphy-Applications to Hydrocarbon Exploration. American Association Petroleum Geologists Memoir 26, pp 117–133
Oldale RN (1985) Upper Wisconsinan submarine end moraines off Cape Ann. Massachusetts. Quaterenary Research 24:187–196
Powell RD (1984) Glacimarine processes and inductive lithofacies modelling of ice shelf and tidewater glacier sediments based on Quaternary examples. Marine Geology 57:1–52
Praeg DB, MacLean B, Hardy IA, Mudie PJ (1986) Quaternary geology of the southeast Baffin Island continental shelf. Geological Survey Canada. Paper 85-14, 38 pp
Stewart FS (1989) An evaluation of seismic and borehole data available from onshore and offshore site investigations of relict glaciated areas. In: Forster A, Culshaw MG, Litle JA (eds) Quaternary Engineering Geology. 25th Annual Conference Engineering Group Geological Society Heriot-Watt University, pp 497–510
Stoker MS (1988) Pleistocene ice-proximal glaciomarine sediments in boreholes from the Hebrides Shelf and Wyville-Thomson Ridge. NW UK Continental Shelf. Scottish Journal Geology 24:249–262
Stoker MS (1989) British Geological Survey shallow drilling programme 1988. British Geological Survey, Marine Report WH/89/19C, 264 pp
Stoker MS (in press a) Glacially-influenced sedimentation on the Hebridean Slope, NW UK Continental Margin. In: Scourse JD. Dowdeswell JA (eds) Glacimarine Environments: Processes and Sediments. Geological Society Special Publication
Stoker MS (in press b) Judd (60°N, 6°W) Quaternary Geology, 1:250,000 Map Series, British Geological Survey
Stoker MS, Long D, Fyfe JA (1985) A revised Quaternary stratigraphy for the central North Sea. Report British Geological Survey, v. 17 No. 2, 35 pp
Syvitski JPM, Praeg DB (1989) Quaternary sedimentation in the St. Lawrence Estuary and adjoining areas: An overview based on high-resolution seismo-stratigraphy. Geographie Physique et Quaternaire, 43:291–310
Thomson ME, Eden RA (1977) Quaternary deposits of the central North Sea. 3. The Quaternary sequence in the west central North Sea. Report Institute Geological Sciences. No. 77/12, 18 pp
Vorren TO, Half M, Edvardsen M, Lind-Hansen O-W (1983) Glacigenic sediments and sedimentary environments of continental shelves: General principles with a case study from the Norwegian shelf. In: Ehlers J (ed) Glacial Deposits in Northwest Europe. Balkema, Rotterdam, pp 61–73
Vorren TO, Lebesbye K, Andreassen K, Larsen K-B (1989) Glacigenic sediments on a passive continental margin as exemplified by the Barents Sea. Marine Geology 85:251–272
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Stewart, F.S., Stoker, M.S. Problems associated with seismic facies analysis of diamicton-dominated, shelf glacigenic sequences. Geo-Marine Letters 10, 151–156 (1990). https://doi.org/10.1007/BF02085930
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DOI: https://doi.org/10.1007/BF02085930