Shelf progradation on a glaciated continental margin, Queen Maud Land, Antarctica

Kristoffersen, Yngve; Winterhalter, Boris; Solheim, Anders

doi:10.1016/s0025-3227(99)00136-x

Cited by 15 publications

(12 citation statements)

References 25 publications

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“…Sedimentation was most rapid during the beginning of interglacials, with rates on the middle slope four to five times higher than during glacials. We note, however, that the grounded EAIS only reached the mid-shelf in this area during the LGM (Kristoffersen et al, 2000). Sediment input in the southern Weddell Sea was focused in the Crary Trough Mouth Fan (Figs.…”

Section: The Glacial/interglacial Environmentmentioning

confidence: 87%

“…WS-3). The pre-ice-sheet Cenozoic shelf edge was more than 10 km landward of its current position along the Dronning Maud Land continental margin (Kristoffersen et al, 2000), and 70 km to the south (Fig. WS-4) in the southern Weddell Sea (Kuvaas and Kristoffersen, 1991).…”

Section: The Weddell Sea Pre-ice-sheet Depositional Environmentmentioning

confidence: 98%

“…Continuity and definition of acoustic stratification improve in the down-slope direction as a result of progressive sorting and increased relative abundance of finer material. The shelf edge may appear rectilinear, but the three-dimensional wedge architecture in the eastern Weddell Sea reveals an amalgation of adjacent small discrete cones of glacial sediments sourced by smaller ice streams (Kristoffersen et al, 2000). The spectrum of cones reflects broad scale expansion of the EAIS, but adjacent cones may or may not be coeval.…”

Section: Acoustic Stratigraphy Of the Shelf/slope/rise Environment-spmentioning

confidence: 99%

“…Moraine complexes on the shelf in the eastern Weddell Sea suggest that the EAIS was grounded on the mid-shelf and did not reach the shelf edge during the LGM (Kristoffersen et al, 2000), except at the mouth of the Crary Trough (Bentley and Anderson, 1998). …”

Section: Cenozoic Climate History From Seismic Reflection and Drillinmentioning

confidence: 99%

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Chapter 5 Cenozoic Climate History from Seismic Reflection and Drilling Studies on the Antarctic Continental Margin

Cooper

Brancolini

Escutia

et al. 2008

Antarctic Climate Evolution

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Section: The Glacial/interglacial Environmentmentioning

confidence: 87%

Section: The Weddell Sea Pre-ice-sheet Depositional Environmentmentioning

confidence: 98%

Section: Acoustic Stratigraphy Of the Shelf/slope/rise Environment-spmentioning

confidence: 99%

Section: Cenozoic Climate History From Seismic Reflection and Drillinmentioning

confidence: 99%

See 2 more Smart Citations

Chapter 5 Cenozoic Climate History from Seismic Reflection and Drilling Studies on the Antarctic Continental Margin

Cooper

Brancolini

Escutia

et al. 2008

Antarctic Climate Evolution

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“…During the next Aranda expedition to Antarctica in 1995-1996 a small marine geological crew with geologist both from GTK and the University of Bergen conducted an airgun survey across the Weddell Sea shelf off Queen Maud land which provided data on the structure of the continental shelf of the region (Kristoffersen et al 2000). The programme included geological drilling on the continental shelf in 200 m of water while moored to the edge of the ice.…”

Section: Antarctic Researchmentioning

confidence: 99%

Prolific decades of marine geology at the Geological Survey of Finland: a historical review

Winterhalter¹

2016

Baltica

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The article presents a short historical review of development of marine geology at the Geological Survey of Finland (GTK). The founder of the marine geology unit at GTK, Dr. Heikki Ignatius, established at an early stage good relations with the Baltic Sea researchers of neighbouring countries. This resulted in joint research cruises, exchange of ideas and close cooperation. The purpose of this article is to highlight some of the important steps taken at GTK and to show how cooperation has resulted in the investigations of the Baltic Sea becoming one of the best studied sea areas in the World Ocean. Keywords • marine geology • marine survey technique • history of oceanographyBoris Winterhalter (boris.winterhalter@kolumbus.fi),

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Response of geomorphic and geological processes to insufficient and ample sediment supply along the upper continental slope in the north-western South China Sea

Chen

Wang

2016

J Earth Syst Sci

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We document upper slope sedimentary process and strata on the passive margin of the northwestern South China Sea (SCS) using multibeam bathymetry and high-resolution seismic data. The upper slope can be divided into two segments based on geomorphology, strata, and sediment supply. (1) The east segment is characterised by deep incised canyons and gullies, and slope failure. Submarine canyons with both U-and V-shaped morphology (13-28 km long × 2-4 km wide) are oriented NNE-SSW or NNW-SSE and are approximately perpendicular to the slope. Erosion is dominant, with escarpments, slumps, and several mass transport deposits (MTDs). Shelf-margin clinoforms show strongly upward vertical aggradation with time and are strongly aggradational in style. Since 5.5 Ma, the shelf break line migrated southwards and then retreated to its present position. The segment is classified as erosion-dominated due to insufficient sediment supply. (2) The west segment has a smooth surface, gentle gradient, and a strongly progradational style, with MTDs triggered by high sedimentation rates. Shelf-margin clinoforms display a combination of progradational and aggradational stacking patterns. The shelf break line migrated southwards with time. The segment is classified as deposition-dominated, resulting from plentiful sediment supply. Depositional models have been constructed for each segment: a constant shelf break model with insufficient sediment supply in the east, and a migration shelf break model with plenty sediment supply in the west. This case study contributes to the understanding of the upper slope sedimentary process and stratigraphic style under different sediment supply conditions.

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Shelf progradation on a glaciated continental margin, Queen Maud Land, Antarctica

Cited by 15 publications

References 25 publications

Chapter 5 Cenozoic Climate History from Seismic Reflection and Drilling Studies on the Antarctic Continental Margin

Chapter 5 Cenozoic Climate History from Seismic Reflection and Drilling Studies on the Antarctic Continental Margin

Prolific decades of marine geology at the Geological Survey of Finland: a historical review

Response of geomorphic and geological processes to insufficient and ample sediment supply along the upper continental slope in the north-western South China Sea

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