Obsidian rocks, Landmannalaugar, Iceland
by Ragnar Sigurdsson (arctic-images.com), Iceland
Obsidian is a naturally occurring volcanic glass formed as an extrusive igneous rock. It is produced when felsic lava extruded from a volcano cools without crystal growth. Higher resolution images available from rth@arctic-images.com (there is a licensing fee depending on the use).
Submitted on 10 January 2010
Categories
- Earth Magnetism & Rock Physics (332)
- Field (2572)
- Geochemistry, Mineralogy, Petrology & Volcanology (786)
Location
- Europe (3221)
- Northern Europe (750)
- Iceland (240)
- Exact location (-19.0670 W, 63.9830 N)
Tags
volcano, lava, igneous, obsidian
Colour distribution
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Licence
Credit: Ragnar Sigurdsson (arctic-images.com) (distributed via imaggeo.egu.eu)
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