On the morphology of the west Greenland shelf with general remarks on the “marginal channel” problem

摘要: Abstract Based on a study of recently published Danish charts the west Greenland continental shelf (Fig. 1) writer discusses various morphological features which have parallels in northwest Norwegian area. One such feature is “marginal channels” separating outer, submarine part rocky uneven “strandflat” from area banks with their bottom loose glacial material. Nearly forty years ago suggested that these depressions—and outer border strandflat where there are no channels—might mark geological boundary line less resistant, possibly Mesozoic, rocks outside it. Later idea was advanced faulting, probably Tertiary time, had taken place along relative uplift land side. The depressions were believed to been formed periods lower sea level through erosion by running water and moving ice, fault zone outlet across “transverse channels”. Of series marginal channels coast, Godthaab Depression its regularly curving trend exceedingly steep eastern slope, particular interest. We also notice great depth channel Melville Bay, coast even today heavily glaciated. Geophysical research carried out later areas Labrador, occur, Norway, has not shown up now marked or structure but rather gently inclined slope old (basement) rock covered sedimentary deposits, Mesozoic younger, increasing thickness outwards. innermost this resistant material, typical deep sharply cut ones (closely connected transverse channels) predominantly erosion.