Products of the Kanatim volcano overlie unconformably those of the Nasaken volcano (No. 085-00-017) to the west but are themselves buried to the north, east and south by material from the Oliyamur (No. 085-00-021) and Kapatagni (No. 085-00-018) volcanoes, so that the full extent is not known. Kanatim consists of trachytic pumice tuffs, welded tuffs and trachyte lavas; numerous trachyte dykes cut the tuffs in the summit area. Phenocrysts include sanidine, anorthoclase, albite, aegirine and aegirine-augite and katophorite; arfvedsonite and aenigmatite have been noted in the lavas.