2.2.3 Naming geological units on land
Geological units exposed on land are given a proper or characterizing name. This is a geographical name from the type section, type locality or type area for the unit (see Section 2.4.5). The geographical name should preferably be on an official topographical map and is to be written as it is spelt on the map except when this conflicts with rules for spelling compound names (cf. Sections 2.2.6 and 2.2.10). However, the guiding principle when spelling geographical names should be that the long-standing, local pronunciation should form the basis for the spelling, as is the case in the rules for spelling official geographical names (NOU 1983, no. 6, p. 65; the Crown Prince Regent`s Decree of May 31st, 1957). Two geographical names linked by a dash may be used in exceptional cases. This may, for example, be required for far-ranging structural units and form elements. If doubt arises concerning the spelling of a name, advice should be sought from the Norwegian Language Council (Norsk språkråd) and the State Adviser on Geographical Names (Statens navnekonsulent).