ABSTRACT
A growing society needs both aggregate extraction and natural environment preservation. The basic mapping principle as described by J. D. de Jong and B. P. Hageman has been adapted in Flanders profile-type maps. Major differences are that the entire Quaternary sequence is represented and although the units are still defined in the field, additional properties were used to define them. Information on the third dimension needs to be added to geological maps, notwithstanding the fact that geological maps remain a two-dimensional representation. This objective can be obtained by creating profile-type maps, with map units consisting of vertical sequences of sediments, called special profile-types, present in the surveyed area. Thematic applied geological maps can greatly assist the exploitation for and development of these natural resources. The criteria for determining map units should be chosen so that the most complete representation of the field geology is presented in a form applicable to the user's needs.
