Surtseyan Eruptions - John Seach

Surtseyan eruptions are caused by explosive water-magma interactions. Surtseyan eruptions produce characteristic "rooster tail" ejections of ash and clasts. The tephra is fine grained and deposited as base surge or air fall deposits. Magma is erupted into water. This type of eruption was seen at Surtsey volcano, 1963-1967.