The analyzed ridges posses a varying morphology and dimensions. They are composed of rocky blocks of local origin only. The blocks are chaoticly arranged although a position transversal to a morphologic axis of the ridge predominates. The ridges occur mainly in places where distinct structural loosenings of the mountain massifs are noted, at the foot of fresh slopes. They define the periods when rockfalls were most intensive. The authors found the subslope ridges to be the nival moraines.
Although the terrestrial marginal zones of some glaciers on Spitsbergen are relatively well described, we are largely ignorant about the morphology of their submarine forefields. Initial reconnaissance of the forefields of the Aavatsmark and Dahl glaciers in the Kaffiøyra region and soundings made in that of the Hans Glacier (southern Spitsbergen ) indicate the occurrence of sea-floor push-moraines which can be as much as 3 m high. Their lateral separation is considered to denote annual recession rates. They appear to result from cyclical annual advances of ice-cliffs during winters when the deposits are risen up at the contact of the ice with the sea-floor. The development of the major forms may be related to surge. There is some evidence that certain elements in the sea-bed morphology date from the Little Ice Age (LIA).
Fluted ground moraine deposits in the forefield zones of the Blomli, Scott and Renard glaciers were investigated. It was found that the fluted moraine crests, especially the stone-rich ones, continue on the glacier front surface as cones or stony belts. The linear ablation forms, partly filled by the supraglacial sediment, are the extensions of the crests formed from the finer material. Thus, the opinion is expressed that the ribs and furrows at the top surface of the ground moraine are the result of the supraglacial material deposition and that they reflect the differentation of the ablation relief of the front surface of the recessing glacier. Till now the fluted relief origin was joined exclusively with the subglacial conditions and such forms were considered as the indicators of the glacier movement direction.
The main relief features of glacier marginal zones in the region between the Billefjorden and Austfjorden comprise ice-cored moraines, outwash plains and glacial lakes. Characteristics of various types of ice-morainic ridges are given. This article presents examples of outwash fan relief. The results of palaeogeographical analysis serve as the basis for distinguishing between three principal stages of development of glacier morphology and meltwater outflow in the region between the Billefjorden and Austfjorden.