obsolete glacial feature true OBSOLETE A hydrographic feature characterized by the dominance of snow or ice. SWEETRealm:LandIce Likely to be depopulated and "glacial" made into a quality or similar. Ice EcoLexicon:ice glacier feature TGN:21410 envoPolar FTT:648 Previously had the axiom 'material entity' and ('composed primarily of' some ('water ice' or snow)) which ended up making incorrect inference. We chose to obsolete this now. Ambiguities in notion of feature and overly general equivalence axiom was making incorrect assertions. For example popsicle would reason under this class. glacer LandIce glacial landform glacier water ice snow