. "EcoLexicon:stack"^^ . "stack"^^ . _:b1216993 . _:b1216993 . "island"^^ . "ENVO:00000419"^^ . _:b1216993 . . "A geological landform consisting of a steep and often vertical column or columns of rock in the sea near a coast."^^ . "ENVO"^^ . _:b1216993 .