A recent archaeological survey of the Lake Moondarra stone axe quarry near Mt Isa in northwest Queensland has identified two leilira blade quarries. These quarries extend the known archaeological boundary of large blades from eastern Arnhem Land into northwest Queensland. The absence of leilira blades from six habitation sites at Moondarra and other sites in Kalkadoon country may assist in defining clear boundaries between two blade types that were used as functional or ritual/ceremonial objects. An argument is advanced that Moondarra provides archaeological evidence to allow a distinction between these types of artefacts in northwest Queensland.