Contrasting glacimarine sedimentary environments of two arctic fiords on Disko, West Greenland

New acritarch species from Holocene sediments in central West Greenland

“…In Qeqertarsuaq, the mean annual temperature is 24 ‡C with 450 mm/yr precipitation (Gilbert et al 1998). During the summer, the meltwater production from the Ilulissat glacier, Inland Ice margin, sea ice and iceberg discharges cause freshening of the sea surface establishing a water column stratification in the bay.…”

“…The hydrography in the bay is characterised by the presence of the West Greenland Current and cold surface waters advected from the Baffin Bay (Buch 2000). The circulation is cyclonic: inflow occurs through the southern part of a line between Qeqertarsuaq and Egedesminde Dyb, whereas outflow occurs through the northern part (Gilbert et al 1998). Archaeological and geomorphologic information combined in a discussion about relative sea level changes in the southern part of the bay during the Holocene are provided by Rash & Jensen (1997).…”

Late Summer Phytoplankton Blooms in the Changing Polar Environment of the Kongsfjorden (Svalbard, Arctic)

“…Grain size of glaciomarine sediments was described by Gilbert et al [19] in two Greenland fjords (Akulliit and Kangerluk). Generally the silty fraction dominated in the Akulliit fjord, but close to the fjord head (mouth), and further from the glacier front, a higher proportion of the sandy-silt fraction was found, while the clay class component was stable at 5%.…”

“…The organic mater content there ranged from 6 to 8% [21]. In other fjords organic matter content ranged from 5.5% in the inner Akulliit fjord to 7% near the mouth of the fjord, reaching up to 9% in the distal part of Kuanersuit fjord [19]. 4.6.…”

Late Oligocene obliquity-paced contourite sedimentation in the Wilkes Land margin of East Antarctica: implications for paleoceanographic and ice sheet configurations

“…In this 455 study, we have further characterized these facies on the basis of sedimentological data (visual core description, facies analysis, CT-scans, HRSEM), physical properties (magnetic susceptibility, NGR); and geochemical data (X-ray Fluorescence-XRF), which allow us to construct a sedimentation model for the depositional setting of Site U1356 during the late Oligocene that is dominated by bottom-current reworking of both, glacial and interglacial deposits. 460 Laminated, fossil-barren, glaciogenic deposits consistent with those of Facies F1 have been observed on younger sedimentary sections from other polar margins and interpreted as contour current modified turbidite deposits and as muddy contourites (Anderson et al, 1979;Mackensen et al, 1989;Grobe and Mackensen, 1992;Pudsey, 1992;Gilbert et al, 1998;Pudsey and Howe, 1998;Pudsey and 465 Camerlenghi, 1998;Anderson, 1999;Williams and Handwerger, 2005;Rebesco, 2007, Escutia et al, 2009). This particular type of glaciogenic contourite facies is associated with glacimarine deposition during glacial times, and has been interpreted to result from unusual, climate-related, environmental conditions of suppressed primary productivity and oxygen-poor deep-waters (Lucchi and Rebesco, 2007).…”