Upper Precambrian diamictites in Varangerfjorden (northern Norway) have been examined for evidence of origin, whether glaciogenic, gravity flow or polygenetic. Studies of geomorphology, sedimentology and surface microtextures on quartz sand grains are integrated to provide multiple pieces of evidence for the geological agents responsible for the origin of the diamictites. The documented sedimentary and erosional structures, formerly interpreted in a glaciogenic context (e.g., diamict structure, pavements and striations) have been reanalysed. Field and laboratory data demonstrate that, contrary to conclusions reached in many earlier studies, the diamictites and adjacent deposits did not originate from glaciogenic processes. Evidence from macrostructures may occasionally be equivocal or can be interpreted as representing reworked, glacially derived material. Evidence from surface microtextures, from outcrops which are believed to exhibit the most unequivocal signs for glaciation, display no imprint at all of glaciogenic processes, and a multicyclical origin of the deposits can be demonstrated. The geological context implies (and no geological data contradict this) an origin by gravity flows, possibly in a submarine fan environment. This reinterpretation of the diamictites in northern Norway may imply that the palaeoclimatological hypothesis of a deep frozen earth during parts of the Neoproterozoic has to be revised.
Abd-Alla, M.A.A., 1991. Surface textures of quartz grains from recent sedimentary environments along the Mediterranean Coast, Egypt. Journal of African Earth Sciences 13, 367-375.
Allen, J.R.L., 1984. Sedimentary structures: their character and physical basis. Developments in Sedimentology 30. Elsevier, Amsterdam, vol. 2, 509-521.
Arnaud, E., 2008. Deformation in the Neoproterozoic Smalfjord Formation, northern Norway: an indicator of glacial depositional conditions? Sedimentology 55, 335-356.
Arnaud, E., 2012. The paleoclimatic significance of deformation structures in Neoproterozoic successions. Sedimentary Geology 243-244, 33-56.
Arnaud, E. & Eyles, C.H., 2002. Glacial influence on Neoproterozoic sedimentation: the Smalfjord Formation, northern Norway. Sedimentology 49, 765-788.
Arnaud, E. & Eyles, C.H., 2004. Glacial influence on Neoproterozoic sedimentation: the Smalfjord Formation, northern Norway - reply. Sedimentology 51, 1423-1430.
Baarli, B.G., Levine, R. & Johnson, M.E., 2006. The Late Neoproterozoic Smalfjord Formation of the Varanger Peninsula in northern Norway: a shallow fjord deposit. Norwegian Journal of Geology 86, 133-150.
Bestmann, M., Rice, A.H.N., Langenhorst, F., Grasemann, B. & Heidelbach, F., 2006. Subglacial bedrock welding associated with glacial earthquakes. Journal of the Geological Society of London 163, 417-420.
Beynon, D.R.V., Chapman, G.R., Ducharme, R.O. & Roberts, J.D., 1967. The geology of the Leirpollen Area, Tanafjord, Finnmark. Norges Geologiske Undersøkelse 247, 7-17.
Bjørlykke, K., 1967. The Eocambrian “Reusch Moraine” at Bigganjargga and the geology around Varangerfjord; Northern Norway. Norges Geologiske Undersøkelse 251, 18-44.
Carter, R.M., 1975. A discussion and classification of subaqueous mass-transport with particular application to grain-flow, slurry-flow, and fluxoturbidities. Earth Science Reviews 11, 145-177.
Chamberlain, T.K., 1964. Mass transport of sediment in the heads of Scripps Submarine Canyon, California. [In:] R.L. Miller. (Ed.): Papers in Marine Geology, Macmillan, New York, 42-64.
Chumakov, N.M., 1988. Riphean glacial deposits of the Baikal Mountain region and the problem of Upper Precambrian low-latitude glaciations. [In:] C.J.S. de Alvarenga (Ed.): Earth’s Glacial Record: IGCP Project 260, 1988 Meeting in Cuiabá - Mato Grosso - Brazil, Abstracts, 5-6.
Costa, J.E., 1984. Physical geomorphology of debris flows. [In:] J.E. Costa, & P.J. Fleisher (Eds): Developments and Applications of Geomorphology. Springer-Verlag, Berlin, 268-317.
Crowell, J.C., 1957. Origin of pebbly mudstones, Bulletin of the Geological Society of America 68, 993-1009.
Crowell, J.C., 1964. Climatic significance of sedimentary deposits containing dispersed megaclasts. [In:] A.E.M. Nairn (Ed.): Problems in Palaeoclimatology, John Wiley & Sons, London, 86-99.
Dakin, N., Pickering, K.T., Mohrig D. & Bayliss, N.J., 2013. Channel-like features created by erosive submarine debris flows: field evidence from the Middle Eocene Ainsa Basin, Spanish Pyrenees. Marine and Petroleum Geology 41, 62-71.
Dill, R.F., 1964. Sedimentation and erosion in Scripps Submarine Canyon head. [In:] R.L. Miller (Ed.): Papers in Marine Geology. Macmillan, New York, 23-41.
Dill, R.F., 1966. Sand flows and sand falls. [In:] R.W. Fairbridge (Ed.): The Encyclopedia of Oceanography. Reinhold, New York, 763-765.
Easton, R.M., 1987. Paleozoic-Precambrian unconformity near Burleigh Falls, Ontario Highway 36, Ontario. [In:] D.C. Roy (Ed.): Northeastern Section of the Geological Society of America, Geological Society of America Centennial Field Guide, 5, 337-338.
Edwards, M.B., 1975. Glacial retreat sedimentation in the Smalfjord Formation, Late Precambrian, North Norway. Sedimentology 22, 75-94.
Edwards, M.B., 1984. Sedimentology of the Upper Proterozoic glacial record, Vestertana Group. Finnmark, North Norway. Norges Geologiske Undersøkelse, Bulletin 394, Universitetsforlaget, Trondheim, 76 pp.
Edwards, M.B., 2004. Glacial influence on Neoproterozoic sedimentation: the Smalfjord Formation, northern Norway - discussion. Sedimentology 51, 1409-1417.
Edwards, M.B. & Foyn, S., 1981. Late Precambrian tillites in Finnmark, North Norway. [In:] M.J. Hambrey & W.B. Harland (Eds): Earth’s Pre-Pleistocene Glacial Record. Cambridge University Press, Cambridge, 606-610.
Elfström, Å., 1987. Large boulder deposits and catastrophic floods. Geografiska Annaler 69A, 101-121.
Elston, D.P., Zhang, H. & Zhang, W., 1988. Paleomagnetic polar paths and polarity zonations from the Proterozoic Jixian and Changhe sections. [In:] G.J.S. de Alvarenga (Ed.): Earth’s Glacial Record: IGCP Project 260, 1988 Meeting in Cuiabá - Mato Grosso - Brazil, Abstracts, 10.
Embley, R.W., 1976. New evidence for occurrence of debris flow deposits in the deep sea. Geology 4, 371-374.
Embley, R.W., 1982. Anatomy of some Atlantic margin sediment slides and some comments on ages and mechanisms. [In:] S. Saxov & J.K. Nieuwenhuis (Eds): Marine Slides and Other Mass Movements. Plenum Press, New York, 189-213.
Evans, D.A.D. & Raub, T.D., 2011. Neoproterozoic glacial palaeolatitudes: a global update. [In:] E. Arnaud, G.P. Halverson & G. Shields-Zhou (Eds): The Geological Record of Neoproterozoic Glaciations. Geological Society London, Memoirs 36, 93-112.
Flood, R.D., Hollister C.D. & Lonsdale P., 1979. Disruption of the Feni sediment drift by debris flows from Rockall Bank. Marine Geology 32, 311-334.
Jensen, P.A. & Wulff-Pedersen, E., 1996. Glacial or non-glacial origin for the Bigganjargga tillite, Finnmark, northern Norway. Geological Magazine 133, 137-145.
Jensen, P.A. & Wulff-Pedersen, E., 1997. Discussion of glacial or non-glacial origin for the Bigganjargga tillite, Finnmark, northern Norway. Geological Magazine 134, 874-876.
Johansen, Y., 2014, pers. comm., Isak Saba senter, www.isaksaba.no/
Johnson, A.M. & Rodine, J.R., 1984. Debris flow. [In:] D. Brunsden & D.B. Prior (Eds): Slope Instability. John Wiley, New York, 257-361.
Johnson, H.D., Levell, B.K. & Siedlecki, S., 1978. Late Precambrian sedimentary rocks in East Finnmark, North Norway and their relationship to the Trollfjord-Komagelv fault. Journal of the Geological Society of London 135, 517-533.
Johnsson, M.J., Stallard, R.F. & Lundberg, N., 1991. Controls on the composition of fluvial sands from a tropical weathering environment: sands of the Orinoco River drainage basin, Venezuela and Colombia. Geological Society of America Bulletin 103, 1622-1647.
Kalińska-Nartiša, E., Woronko, B. & Ning, W., 2017. Microtextural inheritance on quartz sand grains from Pleistocene periglacial environments of the Mazovian Lowland, Central Poland. Permafrost and Periglacial Processes 28, 741-756.
Laajoki, K., 2001. Additional observations on the late Proterozoic Varangerfjorden unconformity, Finnmark, northern Norway. Bulletin of the Geological Society of Finland 73, Parts 1-2, 17-34.
Laajoki, K., 2002. New evidence of glacial abrasion of the Late Proterozoic unconformity around Varngerfjorden, northern Norway. [In:] W. Alterrnann & P. L. Corcoran (Eds): Precambrian Sedimentary Environments: A Modern Approach to Ancient Depositional Systems. International Association of Sedimentologists Special Publication 33, Blackwell, Oxford, 405-436.
Laajoki, K., 2004. The Larajæg’gi outcrop - a large combined Neoproterozoic/Pleistocene roche moutonnée at Karlebotn, Finnmark, North Norway. Norwegian Journal of Geology 84, 107-115.
Mahaney, W.C., 2002. Atlas of sand grain surface textures and applications. Oxford University Press, New York, 237 pp.
McKenzie, J.A., 1991. The dolomite problem: an outstanding controversy. [In:] D.W. Müller, J.A. McKenzie & H. Weissert (Eds): Controversies in Modern Geology. Academic Press, London, 37-54.
Middleton, G.V. & Hampton, M.A., 1976. Subaqueous sediment transport and deposition by sediment gravity flows. [In:] D.J. Stanley & D.J.P. Swift (Eds): Marine Sediment Transport and Environmental Management. John Wiley, New York, 197-218.
Molén, M., 1992. SEM-microtextures: attempting to solve the problem of the origin of diamictons and diamictites. MSc thesis, York University, Toronto, Canada, 182 pp.
Molén, M.O., 2014. A simple method to classify diamicts by scanning electron microscope from surface microtextures. Sedimentology 61, 2020-2041.
Monien, D., 2010. Rapid environmental changes in the Ross Sea Embayment using a geochemical approach. PhD thesis, University of Bremen, Bremen, Germany, 173 pp.
Mountjoy, E.W., Cook, H.E., Pray, L.C. & McDaniel, P.N., 1972. Allochthonous carbonate debris flow - worldwide indicators of reef complexes, banks or shelf margins. [In:] D.J. McLaren & G.V. Middleton (Eds): Stratigraphy and Sedimentology. 24th International Geological Congress, Section 6, Montreal, 172-189.
Perrin, M., Elston, D.P. & Moussine-Pouchkine, A., 1988. Paleomagnetism of Proterozoic and Cambrian strata, Adrar de Mauritanie, cratonic West Africa. Journal of Geophysical Research 93, 2159-2178.
Pichler, T. & Humphrey, J.D., 2001. Formation of dolomite in recent island-arc sediments due to gas-seawater- sediment interaction. Journal of Sedimentary Research 71, 394-399.
Pirlet, H., Wehrmann, L.M., Brunner, B., Frank, N., Dewanckele, J., Van Rooij, D., Foubert, A., Swennen, R., Naudts, L., Boone, M., Cnudde, V. & Henriet, J-P., 2010. Diagenetic formation of gypsum and dolomite in a cold-water coral mound in the Porcupine Seabight, off Ireland. Sedimentology 57, 786-805.
Prusak, D. & Mazzullo, J., 1987. Sources and provinces of Late Pleistocene and Holocene sand and silt on the Mid-Atlantic continental shelf. Journal of Sedimentary Petrology 57, 278-287.
Rice, A.H.N. & Hofmann, C-C., 2000. Evidence for a glacial origin of Neoproterozoic III striations at Oaibaččannjar’ga, Finnmark, northern Norway. Geological Magazine 137, 355-366.
Rice, A.H.N., Edwards, M.B. & Hansen, T.A., 2012. Neoproterozoic glacial and associated facies in the Tanafjord-Varangerfjord area, Finnmark, north Norway. Geological Society of America Field Guide 26, Boulder, 83 pp.
Rice, A.H.N., Edwards, M.B., Hansen, T.A., Arnaud, E. & Halverson, G.P., 2011. Glaciogenic rocks of the Neoproterozoic Smalfjord and Mortensnes formations, Vestertana Group, E. Finnmark, Norway. [In:] E. Arnaud, G.P. Halverson & G. Shields-Zhou (Eds): The Geological Record of Neoproterozoic Glaciations. Geological Society London, Memoirs 36, 593-602.
Roberts, J.D., 1976. Late Precambrian dolomites, Vendian glaciation, and synchroneity of Vendian glaciations. Journal of Geology 84, 47-63.
Røe, S-L., 2003. Neoproterozoic peripheral-basin deposits in eastern Finnmark, N. Norway: stratigraphic revision and palaeotectonic implications. Norwegian Journal of Geology 83, 259-274.
Schermerhorn, L.J.G. 1974. Late Precambrian mixtites: glacial and/or nonglacial? American Journal of Science 274, 673-824.
Schermerhorn, L.J.G. 1983. Late Proterozoic glaciation in the light of CO2 depletion in the atmosphere. Geological Society of America Memoir 161, 309-315.
Shanmugam, G., 2016. Submarine fans: a critical retrospective (1950-2015). Journal of Palaeogeography 5, 110-184.
Shanmugam, G., Lehtonen, L.R., Straume, T., Syvertsen, S.E., Hodgkinson, R.J. & Skibej, M., 1994. Slump and debris-flow dominated upper slope facies in the Cretaceous of the Norwegian and Northern North Seas (61-67oN): implications for sand distribution. American Association of Petroleum Geologists Bulletin 78, 910-937.
Shepard, F.P. & Dill, R.F., 1966. Submarine canyons and other sea valleys. Rand McNally, Chicago, 381 pp.
Shields, G.A., 2005. Neoproterozoic cap carbonates: a critical appraisal of existing models and the plumeworld hypothesis. Terra Nova 17, 299-310.
Siedlecka, A., 1985. Development of the Upper Proterozoic sedimentary basins of the Varanger Peninsula, East Finnmark, North Norway. Geological Survey of Finland, Bulletin 331, 175-185.
Siedlecka, A. & Roberts, D., 1992. The bedrock geology of Varanger peninsula, Finnmark, North Norway: an excursion guide. Norges geologiske undersøkelse, Special Publication 5, 45 pp.
Stock, J.D. & Dietrich, W.E., 2006. Erosion of steepland valleys by debris flow. Geological Society of America Bulletin 118, 1125-1148.
Talling, P.J., Masson, D.G., Sumner, E.J. & Malgesini, G., 2012. Subaqueous sediment density flows: depositional processes and deposit types. Sedimentology 59, 1937-2003.
Talling, P.J., Wynn, R.B., Masson, D.G., Frenz, M., Cronin, B.T., Schiebel, R., Akhmetzhanov, A.M., Dallmeier-Tiessen, S., Benetti, S., Weaver, P.P.E., Georgiopoulou, A., Zühlsdorff, C. & Amy, L.A., 2007. Onset of submarine debris flow deposition far from original giant landslide. Nature 450, 541-544.
Young, G.M., 1991. The geologic record of glaciation: relevance to the climatic history of earth. Geoscience Canada 18, 100-108.
Young, G.M., 2013. Precambrian supercontinents, glaciations, atmospheric oxygenation, metazoan evolution and an impact that may have changed the second half of Earth history. Geoscience Frontiers 4, 247-261.
Zenger, D.H., Dunham, J.B. & Ethington, R.L. (Eds),1980. Concepts and models of dolomitization. Society of Economic Paleontologists and Mineralogists, Special Publication 28, 320 pp.