| 1. |
- Möller, Per, et al.
(författare)
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Gravel and sand flotation: a sediment dispersal process important in certain nearshore environments
- 1994
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Ingår i: Journal of Sedimentary Research. - 1938-3681. ; 64:4, s. 894-898
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Tidskriftsartikel (refereegranskat)abstract
- Small rafts of floating sediment, predominantly of granule and small pebble size, were observed along a tidewater coast on James Ross Island, Antarctica. The sediment was lifted from the beach by the advancing tidewater and kept afloat by surface tension. The current transported the rafts at least 100-150 m off the beach, where the rafts broke up due to wind agitation of the sea surface and the gravel sank. This process can transport considerable volumes of sediment from the beach: it is estimated that flotation at the Naze launch ea. 500 kg per kilometer of shoreline per tidal cycle during calm and dry weather conditions, which for one summer season might end up in a total of 0.022 tons of sediment per meter of shoreline. The resulting sediments and sedimentary structures are concluded to be similar to those resulting from iceberg-, sea ice-, and algae rafting, and sediment gravity flows. Floating can be an important way of rafting gravels into fine-grained sublittoral or shallow-marine facies, and should be included when dealing with processes related to sedimentation in the nearshore marine environment.
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| 2. |
- Möller, Per, et al.
(författare)
-
Late Quaternary glacial history of the west coast of Jameson Land, East Greenland
- 1994
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Ingår i: Boreas. - : Wiley. - 1502-3885 .- 0300-9483. ; 23, s. 447-458
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Tidskriftsartikel (refereegranskat)abstract
- The Late Quaternary (c. 130000-10000 BP) glacial history of the central west coast of Jameson Land, East Greenland. is reconstructed through glacial stratigraphical studies. Seven major sedimentary units are described and defined. They represent two interglacial events (where one is the Holocene). one interstadial event and two glacial events. The older interglacial event comprises marine and fluvial sediments, and is correlated to the Langelandselv interglacial. corresponding to oxygen isotope sub-stage 5e. It is followed by an Early Weichselian major glaciation during the Aucellaelv stade. and subsequently by an Early Weichselian interstadial marine and deltaic event (the Hugin S0 interstade). Sediments relating to the Middle Weichselian have not been recognized in the area. The llugin S0 interstade deposits have been overrun by a Late Weichselian ice advance, during the Flakkerhuk stade. when the glacier. which probably was a thin, low gradient fjord glacier in Scoresby Sund, draped older sediments and landforms with a thin till. Subsequent to the final deglaciation, some time before 10 000 BP. the sea reached the marine limit around 70 m a , and early Holocene marine. fluvial and littoral sediments were deposited in the coastal areas.
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