These atolls are both in the Marshall Islands.
No, the word atolls is the plural form for the singular noun atoll. Example:There are a number of atolls on the coast near my home.
Atolls are formed first as a reef that fringes a volcanic island. The two largest atolls are Suvadiva in the Maldives Island and Kwajalein in the Marshall Islands.
Atolls are typically found in warm tropical and subtropical oceans, particularly in the Pacific and Indian Oceans. They are commonly found in areas with low-lying coral reef islands surrounding a central lagoon. Some well-known atolls include the Maldives, Tuamotu Archipelago, and Marshall Islands.
crustal sinking
crustal sinking
Atolls, Coral reefs, and lagoons Source: World Geography textbook
Atolls
Atolls don't float to start with. There is land, the remnants of former volcanic islands, beneath them. The lagoon in the centre is not connected to the sea.
lagoon
atolls
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