Volcanic Islands and Archipelagos

This group collects the Volcanic Formations subcategory's members that are themselves an island, islet, atoll, archipelago, reef or skerry of volcanic origin, rather than a single named volcano that happens to stand on one. A member whose own description identifies it as a specific stratovolcano, shield volcano, caldera or other volcano type is placed in that type's own group even when the volcano itself forms or sits on an island, such as Concepcion Volcano on Ometepe Island; this group is reserved for the island, reef or island-group entity itself, correcting an earlier unlanded classification pass that had counted any volcanic feature mentioning an island as belonging here regardless of its own more specific volcano type.