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Photographer's Note

HVERAVELLIR (The Hot Spring Fields)
Hveravellir (The Hot Spring Fields) is a very interesting low temperature area at the northern edge of the lava field Kjalhraun.

The highland region between the glaciers Langjökull and Hofsjökull is called Kjölur (The Keel). The landscape in the region has been shaped by the glaciers of the last Ice Age, which receded some 10 thousand years ago. Table mountains, stapar such as Hrútfell, of tuff were formed in eruptions under glacial caps. The shield volcano, or dyngja; Kjalhraun was formed by thinly flowing lava soon after the glaciers receded. In a hollow near its northern end is the Hveravellir high-temperature area (over 150°C 1000 m underground), 630 m above s.l.

The oldest written description of the area, from 1752, describes the hot springs, from one of which (named Öskurhóll or Shrieking mound) rumblings and whistling noises issued forth. The water in the hot springs contains large amounts of dissolved substances and as it rises to the surface it cools and various substances are deposited to form crusts around the springs. The unusually colourful crusts formations at Hveravellir are mainly of silica.

jmcl, Paolo, brevbrev14 oznaczył to zdjęcie jeko użyteczne

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Additional Photos by Michel Detay (mdetay) Gold Star Critiquer/Gold Note Writer [C: 487 W: 1 N: 1045] (4929)
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