Volcanic Springs

Geysers, Hot Springs,
Mud Pots, and Fumaroles

Gunnuhver, Kísilhóll Group

Gunnuhver is a special geothermal area because a major part of its groundwater comes from the nearby sea, containing lots of salt and also dissolved silica. Continuous hot spring activity has formed huge deposits of silica sinter, today visible as silica hill.

Kísilhóll, seen from the west:

Kísilhóll Gunnuhver Iceland

A huge number of fumaroles and mud pots are located at and around Kísilhóll. The following picture conveys a typical impression of a pinhole fumarole on the silica surface.

Fumarole at Kísilhóll:

Fumarole Kísilhóll Gunnuhver Iceland

Best known is the vigorously boiling mud crater northeast of Kísilhóll, which came into being in 2007 and adopted the name Gunnuhver. Spanning a diameter of 66 feet (20 m) it is the largest mud pot in Iceland.

The large mud crater Gunnuhver:

Mud Crater Kísilhóll Gunnuhver Iceland

Mud Crater Gunnuhver Iceland
At the northern slope of Kísilhóll a pronounced hole attracts attention, probably a bowl of an extinct geyser or mud pot.

Mud Pot Gun 2:

Mud Pot Kísilhóll Gunnuhver Iceland

Three examples of fumaroles in the vicinity of Kísilhóll are shown below.

Fumaroles in the vicinity of Kísilhóll:

Fumarole Kísilhóll Gunnuhver Iceland

Fumarole Kísilhóll Gunnuhver Iceland

Fumarole Kísilhóll Gunnuhver Iceland

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