A RING-SHAPED REEF, ISLAND, OR CHAIN OF ISLANDS FORMED OF CORAL.

A DEEP GORGE, TYPICALLY ONE WITH A RIVER FLOWING THROUGH IT.

A TRIANGULAR TRACT OF SEDIMENT DEPOSITED AT THE MOUTH OF A RIVER

AN AREA OF LOW-LYING, UNCULTIVATED GROUND WHERE WATER COLLECTS

A PLACE ON THE COAST WHERE VESSELS MAY FIND SHELTER

A PIECE OF LAND ALMOST SURROUNDED BY WATER

A PIECE OF LAND SURROUNDED BY WATER.

HAVING A CRATER OR VENT THROUGH WHICH LAVA

A LARGE NATURAL STREAM OF WATER