Herliansky gejzír - Herlany geyser EarthCache
Herliansky gejzír - Herlany geyser
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Slovakia is a watering place known in the past. A little but very benefit spa lies near the village Herľany below the foothil of the western slopes of the Slanské vrchy Mts.
The site represents a specific type of geyser, which is different from typical geysers by its situation in a volcanic mountain which is now inactive, and by its artificial activation through a well which was 404,5 meters deep and its low temperature thermal water.
The site is situated near the village of Herl'any in the middle part of the Kosická basin on west uphill of the mountains Slanske vrchy, which are a component of the volcanic neogene territory of the Carphatian arch. The sea covered the territory during the Tertiary period and detritic and pelitic sediments were deposited there. During the period of marine sedimentation, in the Sarmat period, volcanic activity was activated and conditioned the formation of the volcanic Slanske vrchy mountains. The complex of volcanic rocks of the Slanske vrchy covered the sediment. These rocks were created by a line of andesite volcans, which, as e. result of intensive post-volcanic erosion activity, retain just relicts of their original construction. In their construction we can see a central crater, transitional (stratovolcanic jacket;, and peripheral volcanic zones.
The geological construction of the territory was cut by tectonic faults of a retrogressional character. Faults broke the complex of vulcanites, neogene sediments, and substrate paleogene rocks and were important factors in establishing the regime and circulation of underground water.
Herl'any geyser activity is maintained mostly by a system of rain water infiltration, the circulation of underground water and by a system of carbon oxide admission. The carbon oxide acts as a main energy source causing fluctuating water eruptions. The water is filled with carbon oxide and after that the whole system works on the siphon principle.
A spa existed in herl'any from the 18th century but its development required a necessary and sufficient supply of curative mineral water.
Thus, well work was started in 1870 and the first horizon of underground water was struck at a depth of 111 meters. When the well reached a depth of 172 meters the first eruption occurred. The next eruption occurred when a depth of 275 meters was achieved. When the well achieved a depth of 330 meters water erupted for 10 days reaching to a height of 112 meters. The well was finished after reaching a depth of 404.5 meters.
Eruption intervals in the beginning were 8 - 9 hours and the intensity of the water was 21 - 36 litres per second. The current eruption intervals are between 32 - 34 hours, with the water reaching a height of 15 meters. The eruption lasts approximately 26 minutes and has an average intensity from 25 to 30 litres per second. The interval between eruptions is shortened in the case of efficient rainfalls. Although time between individual eruptions varies and the intensity decreases, it is assumed, if geyser will not be mechanically damaged, that it will work for a long time.
The start of the eruption can be predicted by the typical smell of hydrogen sulphide (H2S). During the eruption, groundwater temperature increases from 10°C to 17.8°C, followed by the increase of CO2 content dissolved in groundwater up to 1.385 g/l. The average total dissolved solids content (TDS) is about 6.3 g/l, bicarbonate (HCO3) content is 3.0 g/l , sodium (Na) 1.7 g/l, chlorides (Cl) 1.3 g/l, calcium (Ca) only 0.2 g/,l and H2S with its characteristic smell is present at the level of 1.24 mg/l. Groundwater is of sodium-chloride-bicarbonate type, with salty taste. Today, the area around the Herľany geyser is built up as a fountain in park surroundings.
In 125 years of existence, the geyser has erupted more than 40000 times and sprinkled on the surface around 20 million of partially mineralised water. Water erupted by the geyser is not extremely well-suited for curative purposes, because the pharmacologically effectivesubstances are shaken from the water during the eruption.
To log your cache you need to:
1.Attach a photo of you with your GPS device in front of the Geyzer. (Lone wolves may attach the photo of GPS showing the coordinates)
Send me an email through my profile with answers to these questions:
2.How many hl of water is going out with one eruption?
3.How is conected name Daniel Textoris with this gave?
4.Which sediment was cored in depth 404,05?
5.Write an chemical formula of chemical that predicted the eruption of the geyser?
6.How long and how high had the water erupted when the deep hole was 33O meters deep?
You can log in with photo immediately. The answers to questions send on @, if would be anything wrong we will contact you.
Podmienky zalogovania cache:
1. Prilozit k logu fotografiu s GPS pred alebo pod gejzírom. (osameli vlci prilozia fotku GPS s citatelnymi suradnicami)
Poslat mi email s odpovedami na nasledujuce otazky:
2. Kolko je výdatnost jednej erupcie v hl?
3.Ako je spojené meno Daniela Textorisa s gejzírom?
4.Realizovaný vrt bol vrtaný do hlbky 404.05m v sedimentech ……. .
5.Napíš chem. Vzorec látky , který predznamenává erupciu gejzíru.
6. Ako dlho a ako vysoko striekala voda ked navrtali hlbku 330 m?
Logujte s fotkou okamžite. Odpovede na otázky zasielajte na @, pokial nebude nieco v poriadku budeme vás kontaktovat.
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