A lava flow spilled out of the lava lake on the right side of the image. Final flow length is approximately 20 meters.
Location: Antarctica, Ross Island on Ross seaAge: less than one million years oldElevation: 12,444 feet, 3,794 m Coordinates: 77.5S, 167.2E
Small ash eruption from central vent.
A quick succession of two small strombolian eruptionsfrom main lava lake. This eruption sequence is very
similar to another eruption earlier.
Erebus is an active volcano with a convecting lava lake within a summit. It has been continuously active since 1972.
Most eruptions are small and stombolian in character.
The lava within the lava lake is alkalic in composition. Specifically, it is called anorthoclase phonolite. Anorthoclase is a feldspar mineral. Phonolite refers to rocks made of the minerals alkali feldspar and nepheline. Alkalic lava is common in rift volcanoes.
Volcano world: http://volcano.und.edu/Mt. Erebus Volcano Observatory: www.ees.nmt.edu/Geop/mevo/mevo.html
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