Question

A short article on the Geysers of Iceland

Answer 1

               GEYSERS OF ICELAND

 The Great Geysir of Iceland, which first erupted in the 14th century, that the world's geysers take their name. It used to erupt every 60 minutes until the early 1900s when it became dormant. Earthquakes in June 2000 subsequently reawakened the giant and it now erupts approximately every 8 to 10 hours.

The second most famous geyser in Iceland is Strokkur, which erupts every 8 minutes throwing a column of water and steam to a height of 20 metres or so. There are also several other smaller ones.

Geysers are found in active volcanic areas or land that is prone to earthquakes. Thermal or hot springs are also a feature, as are boiling mud pools, often appreciated for their medicinal qualities.

The powerhouse of a geyser lies deep underground, where surface water seeps through fissures and collects in caverns. The temperature of the surrounding volcanic rock, at around 200 °C, heats the trapped water, causing it to expand into steam and force its way up and out.

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Answer 2

geyser is a spring characterized by an intermittent discharge of water ejected turbulently and accompanied by steam. As a fairly rare phenomenon, the formation of geysers is due to particular hydrogeological conditions that exist only in a few places on Earth. Generally all geyser field sites are located near active volcanic areas, and the geyser effect is due to the proximity of magma. Generally, surface water works its way down to an average depth of around 2,000 metres (6,600 ft) where it contacts hot rocks. The resultant boiling of the pressurized water results in the geyser effect of hot water and steam spraying out of the geyser's surface vent (a hydrothermal explosion).

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