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South Arch volcanic field information


South Arch volcanic field
South Arch volcanic field is located in Pacific Ocean
South Arch volcanic field
South Arch volcanic field
200 kilometres (120 mi) south from Hawaiʻi Island
Highest point
Elevation10 m (33 ft)Above sea floor
Coordinates17°15′N 155°45′W / 17.250°N 155.750°W / 17.250; -155.750[1]
Dimensions
Length35 km (22 mi)
Width50 km (31 mi)
Geography
Location200 kilometres (120 mi) south from Hawaiʻi Island
CountryUnited States
StateHawaii
Geology
Mountain typeVolcanic field
Type of rockBasaltic rock
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South Arch volcanic field
200km
124miles
South Arch volcanic field
South Arch
  
Location south of the Hawaiian Islands

South Arch volcanic field is an underwater volcanic field south of Hawaiʻi Island. It was active during the last 10,000 years, and covers an area of 35 by 50 kilometres (22 mi × 31 mi) at a depth of 4,950 metres (16,240 ft).

Although the field is related to the Hawaiian hotspot, it does not appear to be a precursory volcano, but seems to have formed when the weight of the growing Hawaiian volcanoes caused the oceanic crust to buckle, opening up pathways for magma to ascend in front of the hotspot.

  1. ^ Holcomb et al. 1989, p. 611.

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