Supply Reef

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Supply Reef
Summit depth −8 m (−26 ft)
Pronunciation Northern Mariana Islands, United States
Location
Coordinates 20°08′N 145°6′E / 20.133°N 145.100°E / 20.133; 145.100
Geology
Type Submarine volcano
Last eruption September to December 1989

Supply Reef is a submerged circular reef of volcanic origin in the Northern Mariana Islands chain, about 10 kilometres (6 mi) NW of the Maug Islands. Presently this igneous seamount is roughly 8 metres (26 ft) below the ocean's surface and about 100 m (300 ft) in diameter.

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