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Zealandia Bank | U.S. Geological Survey Skip to main content
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Zealandia Bank

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Zealandia Bank consists of two pinnacles about 1 km apart rising from a submerged bank to near the ocean surface between Guguan and Sarigan Islands (Commonwealth of the Northern Mariana Islands).

Facts Block

Location: Commonwealth of the Northern Mariana Islands

Latitude: 16.88° N

Longitude: 145.85° E

Elevation: 0 (m) 0 (f)

Volcano type: Stratovolcano 

Composition: Basalt / Picro-Basalt, Andesite / Basaltic Andesite

Most recent eruption: Unrest in the Holocene

Threat Potential: Low*

*based on the National Volcano Early Warning System

Summary

Zealandia Bank consists of two pinnacles about 1 km apart rising from a submerged bank to near the ocean surface between Guguan and Sarigan Islands. One pinnacle reaches more than 1 m above water at low tide. Andesitic rocks were dredged at the southern peak, which showed some evidence of coral growth. Freshly broken pahoehoe basaltic rocks were recovered from 1.7 km depth on the western flank. The age of the most recent eruptive activity is not known, but a NOAA bathymetric survey in 2004 detected fumarolic activity. From the Smithsonian Global Volcanism Program.

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