NJG85-4-01
2005
Deep-water sedimentary systems of Arctic and North Atlantic margins: An introduction
85
4
pp. 261-266
82-92394-23-0

The conference "Deep-water sedimentary systems of Arctic and North Atlantic margins" held in Stavanger, Norway from October 18th - 20th 2004 illustrated the wide temporal and spatial variability of Upper Mesozoic and Cenozoic deep-water sedimentary systems developed in this region. Particularly, Late Neogene high-latitude systems stand out as very different from pre-Neogene systems because of glacial control on sediment supply and source type. The high rates of sediment supply, steep slopes and deep basin bathymetries in these systems led to a dominance of slope instability with debris flows as depositional processes. Also, the onset of deep-water currents since the Miocene, as a response to deepening in the North Atlantic following sea-floor spreading, has played a major role in shaping systems. Pre-Neogene systems tend to be smaller and dominated by turbidity current deposits in contrast to younger systems. Evidence of continuous basinal and along-slope currents is rare, supporting the view that basins were shallower and smaller than in the Neogene.

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