52. Iceland (1994)
by M. Bamlett and J. F. Potter
During the last 16 million years (up to recent times) igneous rocks with a variety of compositions have been extruded and then moved E or W of the rift valley which marks the central line of the Mid-Atlantic Ridge The ice sheets and their associated glaciers formed by the accumulation of snow over hundreds of years, occupy 11% of Iceland. The pressure on water trapped in geothermally heated cavities close to the land surface is occasionally relieved generating Geysers. The itineraries in the Guide provide a representative selection of sites of the above.
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