coral pinnacle

[′kär·əl ′pin·ə·kəl]

(geology)

A sharply upward-projecting growth of coral rising from the floor of an atoll lagoon.

References in periodicals archive ?

Terrain: Rough beach rises to a fertile but narrow ring around a raised, prehistoric coral reef plateau, studded with coral pinnacles exposed by phosphate mining.

Background note: Nauru

"Except for a coastal strip," he continues, "it is a desert of jagged coral pinnacles, uninhabitable, a ghostly array of tombstones baking in the equatorial sun."

Trouble in paradise

Its coral pinnacles rise 60 feet or more from the sea floor to within 10 to 15 feet of the surface.

Exploring Fiji's underwater world

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