New Zealand · Caldera
Macauley Island
Macauley
- Type
- Caldera
- Elevation
- 238m
- Last eruption
- -4360
- Type
- Caldera
- Country
- New Zealand
- Region
- Tonga & Kermadec / Middle Kermadec Volcanic Arc
- Elevation
- 238m
- Coordinates
- -30.210, -178.475
- Last eruption
- -4360
- Tectonic setting
- Subduction zone / Oceanic crust (< 15 km)
- Landform
- Caldera
- Major rock type
- Basalt / Picro-basalt
Geological summary
Macauley Island is a rim remnant of a large submarine caldera centered 8 km to the NW. The 2-km-diameter island consists of a low, gently sloping surface of rhyolitic pumice from the caldera-forming eruption truncated by steep cliffs formed of underlying basaltic lava flows.
Excerpt from the Global Volcanism Program, Smithsonian Institution · Read the full summary on GVP →
From Wikipedia
Macauley Island is a volcanic island in New Zealand's Kermadec Islands, approximately halfway between North Island of New Zealand and Tonga, in the south-west Pacific Ocean. It is part of a larger submarine volcano that features a 10.5-by-7-kilometre wide underwater caldera northwest of Macauley Island. Two islets, Haszard Island and Newcome Rock, lie east offshore of Macauley Island. The island is mostly surrounded by high cliffs that make it difficult to access; the inland parts are mostly gently sloping terrain covered with ferns and grasses.
Wikipedia · CC BY-SA · Read full article →
Eruption history
3 recordedGlossaryRecord summary
- Confirmed eruptions
- 1
- Uncertain eruptions
- 2
- Span of confirmed record
- 4360 BCE (±200 yrs) – 4360 BCE
- Largest confirmed eruption
- VEI 6 (4360 BCE)
- Confirmed eruptions since 1900
- 0
Detailed timeline
- 1887VEI 0Method not stated1887-12-01 – end unknown22 km NNE of Macauley Island
- 1825VEI 0Method not stated1825-09-06 – end unknown"Brimstone Island," W of Macauley Island
- 4360 BCE (±200 yrs)VEI 6Geological estimate4360 BCE – end unknown
Nearby volcanoes
External links
⚠ For reference only. Not for emergency response.