Glacial and Glacial Marine Sediments of the Antarctic Continental Shelf

摘要: Until recently, contributions towards the understanding of glacial marine sedimentation have been limited. Sedimentologie studies continental shelf deposits recently cored in Weddell Sea, Ross and George V region Antarctica enabled distinction three types sediment. Type 1 sediments are massive, poorly sorted, texturally mineralogically homogeneous downcore; they unfossiliferous or contain reworked fossils, lack a preferred pebble orientation, overcompacted. They interpreted as being basal tills. 2 crudely stratified, sorted mud fraction, heterogeneous downcore, distinctive microfossil assemblages, typically normally compacted, horizontal fabric. 3 similar to except that depleted silt clay moderately sand fraction. Both deposited from floating ice re...