02454nas a2200229   4500000000100000000000100001008004100002260002000043100001800063700001500081700001400096700001400110700001500124700001400139700001800153700001500171245013900186856006000325300001000385490000800395520182100403       2002                            d  cJanuary 1, 20021 aJ. Dowdeswell1 aC. Cofaigh1 aJ. Taylor1 aNH Kenyon1 aJ. Mienert1 aM. Wilken1 aJ. Dowdeswell1 aC. Cofaigh00aOn the architecture of high-latitude continental margins: the influence of ice-sheet and sea-ice processes in the Polar North Atlantic  uhttp://sp.lyellcollection.org/content/203/1/33.abstract  a33-540 v2033 aThe presence of ice during the Late Cenozoic distinguishes the nature and rates of processes on high-latitude margins from those elsewhere. Ice sheets terminating in marine waters deliver icebergs, meltwater and debris to high-latitude seas. Sea ice influences ocean salinity structure and downslope water and sediment transfer, and also transports fine-grained sediments over long distances. These cryospheric processes have led to the development of a distinctive sedimentary architecture on modern high-latitude continental margins. Large submarine fans made up almost entirely of stacked debris flows are present around the Norwegian-Greenland Sea. Large slides are located in a variety of settings relative to rates of sediment delivery from Quaternary ice-sheet margins, but no large slides have been mapped on the East Greenland margin. However, extensive channel systems and sediment-wave fields are present in the Greenland Basin, probably related to intermittent downslope flow of dense water and turbidity currents. The extensive NE Greenland shelf was not innundated by ice-sheet advance during recent full-glacial conditions, allowing sea-ice and deep-water production during both interglacials and full-glacials. Changes in the nature and rate of sedimentation within the Greenland Basin should provide clues on the rate of dense-water production, with implications for thermohaline circulation in the North Atlantic. Other erosional and depositional features on the Norwegian-Greenland Sea margins include canyons and contourite drifts. High-relief tectonic features influence sediment reworking by turbidity currents at abyssal depths. A simple conceptual model for glacier-influenced marine sedimentation summarizes the role of cryospheric processes in high-latitude margin sedimentary environments.