3970617755

Every method of mapping has its inconsequencies and defects. Klimaszewski distinguishes: forms of denudative origin, forms of fluvial origin, forms of suffosional origin, anthropogenic forms.

In such a classification there is an important piece of interpretation and with it, a piece of hypothesis. So does Klimaszewski^ key speak of ‘forms created by the destructive action of denudative factors’ under which are reckoned ‘fragments of older surfaces of planation’. Such plateaus can be remnants of raised peneplains, where river gravel may be found. This is, for example, the case in the Sarmato-Pontic peneplain in the frontier region between the Belgian Ardennes and Dutch South-Limburg which is typified by a deep yellow-red podsolic soil profile with

1

Fig. 1. The topographic basis of a part of Jungerius’ pedo-sedimentological map

of the Moutfort region in Luxemburg.

silicious oolitic pebbles on top. In such a case it is clearly shown that the plateau is not only a product of weathering processes, materiał transport (denuaative processes sensu stricto) but also of river erosion and there-fore, not only of denudative origin. It seems here desirable to remove the hypothetical element in the descriptions in the key somewhat, but this is naturally not impossible. In the text of the commentary, which should accompany every map, it is possible to discuss the interpretation and origins of certain forms morę fully. I will not go into further details.

And now, if I may go over to the ąuestion of International coopera-tion, I should like to put forward the following propositions:

1. The Polish geomorphological maps 1 : 50,000 of Klimaszewski and Galon are, beyond any doubt, of the best that we possess at present.

18