Ma'anar ƙamus na "shelf ice" wani nau'in kankara ne mai iyo wanda ya karye daga glacier ko kuma kankara kuma yana shawagi a cikin teku. Ana kuma kiranta da "kankara shelf" ko "kankara shelf". Kankarar kankara na iya zama haɗari ga jiragen ruwa da ke tafiya a cikin ruwan ƙanƙara, kuma yana iya ba da gudummawa ga hauhawar matakan teku idan ya narke.
