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Namafjall is a high-temperature geothermal area with fumaroles and mud pots. At a depth of 1000m, the temperature is above 200 degrees Celcius. Along with the steam comes fumarole gas, such as hydrogen sulfide which is responsible for the characteristic hot spring smell in these areas. The hot spring produce considerable sulphur deposits. In previous centuries sulphur was mined in Iceland to produce gun powder.
CAUTION: Unsafe soil and high temperatures (80-100C). Please walk only on the paths and marked trails.
The text above was extracted from a sign in Namafjall Hverir.
Created with fd's Flickr Toys.
The fumarole field at Asahidake, an area of thermal springs and gas vents where magma or hot igneous rocks at shallow depth are releasing gases or interacting with groundwater.
Asahidake, a stratovolcano, is the tallest mountain in Hokkaidō, Japan. Part of the Daisetsuzan Volcanic Group of the Ishikari Mountains, it is located in the northern part of the Daisetsuzan National Park.
The fumarole field at Asahidake, an area of thermal springs and gas vents where magma or hot igneous rocks at shallow depth are releasing gases or interacting with groundwater.
Asahidake, a stratovolcano, is the tallest mountain in Hokkaidō, Japan. Part of the Daisetsuzan Volcanic Group of the Ishikari Mountains, it is located in the northern part of the Daisetsuzan National Park.
A constantly bubbling drowned fumarole with extremely hot water heated by underground magma, as viewed from the Bumpass Hell Nature Trail in Lassen Volcanic National Park, California, USA
Hot springs are sites where groundwater emerges at the Earth’s surface (or on the seafloor). Hot spring water has to be higher in temperature than the human body (an admittedly arbitrary definition): over 98° Fahrenheit or over 37° Celsius. Geysers are hot springs that episodically erupt columns of water. The highest concentration of geysers and hot springs anywhere is at the Yellowstone Hotspot Volcano in northwestern Wyoming, USA.
Beryl Spring is located in Gibbon Canyon in Yellowstone’s Gibbon Geyser Basin. It has hot, aquamarine-colored water, hence the name “Beryl” (aquamarine is a bluish, gem-quality variety of the mineral beryl, Be3Al2Si6O18 - beryllium aluminosilicate). The pool has constant, energetic roiling and boiling, accompanied by significant overflow in a well-developed runoff channel. Behind Beryl Spring is a prominent, noisy fumarole that has been given the catalog designation GGCGNN073. Fumaroles are hot steam vents.
Fumaroles in the crater of Turrialba Volcano. Turrialba is the easternmost active volcano in Costa Rica’s Central Volcanic Range. It is approximately 24 km northwest of Turrialba city in the province of Cartago. It is close to Irazú Volcano and between them, they form a single volcanic system. It is a stratovolcano and its current structure has been shaped by explosive and effusive lava events. It has three craters with the largest having a diameter of 50 m. The craters generally contain acid lakes, but at the time of our visit they had dried up due to lack of rain The highest elevation of the volcano is 3340 m, making it the second highest volcano in Costa Rica.
At this point on the volvano there are fumaroles where gasses escape from below (water vapour, carbon dioxide and monoxide, hydrogen sulphide and methane). If you put your hand in one you can feel the heat escaping too (temperature 75-95 degrees C). Quite impressive!
Hot springs are sites where groundwater emerges at the Earth’s surface (or on the seafloor). Hot spring water has to be higher in temperature than the human body (an admittedly arbitrary definition): over 98° Fahrenheit or over 37° Celsius. Geysers are hot springs that episodically erupt columns of water. The highest concentration of geysers and hot springs anywhere is at the Yellowstone Hotspot Volcano in northwestern Wyoming, USA.
Beryl Spring is located in Gibbon Canyon in Yellowstone’s Gibbon Geyser Basin. It has hot, aquamarine-colored water, hence the name “Beryl” (aquamarine is a bluish, gem-quality variety of the mineral beryl, Be3Al2Si6O18 - beryllium aluminosilicate). The pool has constant, energetic roiling and boiling, accompanied by significant overflow in a well-developed runoff channel. Behind Beryl Spring is a prominent, noisy fumarole that has been given the catalog designation GGCGNN073. Fumaroles are hot steam vents.
About Námaskarð
Situated on the north side of Iceland's Lake Myvatn, this geothermal wonder of hot sulfuric mud springs and steam springs (solfataras and fumaroles if you're a geology nerd) is otherworldly. Black rivers and bubbling pools of sulfuric mud cut through a landscape that's rich with colorful minerals and is continuously steaming.
Námaskarð is a magnificent example of how strange and "unearthly" our planet's natural landscapes can be, and just how pungent they can be as well.
Piles of ash, scoria, and boulders. The ash was very fine, like flour. The rocks were, in some instances very sharp, as one of our party found out to his cost. Down by the Lakes, he disturbed a piece of basalt, which tumbled down after him, broke, and sliced a deep cut in his leg. This required nine stitches, and an airlift off the mountain. A rather dramatic means of getting a free helicopter ride!
Hot springs are sites where groundwater emerges at the Earth’s surface (or on the seafloor). Hot spring water has to be higher in temperature than the human body (an admittedly arbitrary definition): over 98° Fahrenheit or over 37° Celsius. Geysers are hot springs that episodically erupt columns of water. The highest concentration of geysers and hot springs anywhere is at the Yellowstone Hotspot Volcano in northwestern Wyoming, USA.
Beryl Spring is located in Gibbon Canyon in Yellowstone’s Gibbon Geyser Basin. It has hot, aquamarine-colored water, hence the name “Beryl” (aquamarine is a bluish, gem-quality variety of the mineral beryl, Be3Al2Si6O18 - beryllium aluminosilicate). The pool has constant, energetic roiling and boiling, accompanied by significant overflow in a well-developed runoff channel. Behind Beryl Spring is a prominent, noisy fumarole that has been given the catalog designation GGCGNN073. Fumaroles are hot steam vents.
Bubbling mudpots, fumaroles, steaming vents, boiling springs and sulphur deposites at the slpoes of Namafjall, Myvatn, Iceland, July 2010
White Island (Whakaari) is the perfect example of an active volcano. It breathes, it roars and it hisses from steaming vents releasing 800°C toxic gases.
Lassen Volcanic National Park, California. Compared to Yellowstone the geothermal activity on display is quite minor.
en.wikipedia.org/wiki/Geothermal_areas_in_Lassen_Volcanic...
The fumarole field at Asahidake, an area of thermal springs and gas vents where magma or hot igneous rocks at shallow depth are releasing gases or interacting with groundwater.
Asahidake, a stratovolcano, is the tallest mountain in Hokkaidō, Japan. Part of the Daisetsuzan Volcanic Group of the Ishikari Mountains, it is located in the northern part of the Daisetsuzan National Park.
This thing is covered with fumaroles, and what you see is the mineral deposits that come from them overtaking the forest. The remaining forest that you see is very burnt, like many areas of Yellowstone.
Namafjall is a high-temperature geothermal area with fumaroles and mud pots. At a depth of 1000m, the temperature is above 200 degrees Celcius. Along with the steam comes fumarole gas, such as hydrogen sulfide which is responsible for the characteristic hot spring smell in these areas. The hot spring produce considerable sulphur deposits. In previous centuries sulphur was mined in Iceland to produce gun powder.
CAUTION: Unsafe soil and high temperatures (80-100C). Please walk only on the paths and marked trails.
The text above was extracted from a sign in Namafjall Hverir.
The fumarole field at Asahidake, an area of thermal springs and gas vents where magma or hot igneous rocks at shallow depth are releasing gases or interacting with groundwater.
Asahidake, a stratovolcano, is the tallest mountain in Hokkaidō, Japan. Part of the Daisetsuzan Volcanic Group of the Ishikari Mountains, it is located in the northern part of the Daisetsuzan National Park.