Mount Gambier (volcano)
| Mount Gambier | ||
|---|---|---|
 The Blue Lake, one of the maar lakes of Mount Gambier |
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| height | 190 m | |
| location | Mount Gambier , South Australia | |
| Mountains | Newer Volcanics Province | |
| Coordinates | 37 ° 50 '32 " S , 140 ° 45' 59" O | |
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| Type | Maar | |
| Last eruption | 2900 BC Chr. | |
Mount Gambier is a maar complex in the Newer Volcanics Province near the city of Mount Gambier in South Australia . The complex consists of the four maars: Blue Lake , Valley Lake , Leg of Mutton Lake and Browne's Lake . It is one of the youngest volcanoes in Australia and formed around 4,900 years ago.
The formation of Mount Gambier, like that of the nearby Mount Schank, is traced back to the East Australia hotspot , which today is probably under the sea. The Mount Gambier area is part of the UNESCO-supported Kanawinka Geopark .
Of the originally four existing maar lakes, two still exist today. For the sake of its form called Leg of Mutton Lake ( Schafsbeinsee ) fell in the 1960's dry, just like the Browne's Lake a few years later. Both lakes were fairly shallow, their drying up is attributed to the lowering of the groundwater level as a result of years of drainage to secure pastureland in the area.
Blue Lake
In the warmer months, the Blue Lake changes its normally blue-gray color and takes on an intense blue color. The mechanism of the color change has not been fully understood for a long time. The phenomenon is due to an interplay between the turbidity of the water built up by algae, the formation of a warm surface layer and the temperature-dependent precipitation of the smallest calcium carbonate particles , which strongly reflect the blue light components. They also react with the humic acids in the organic residues and thus contribute to the clarification of the lake water.
Web links
- New volcanic provinces in the Global Volcanism Program of the Smithsonian Institution (English)
Individual evidence
- ↑ volcano.oregonstate.edu: Mount Gambier, Newer Volcanic Province, South Australia (English)
- ↑ a b c Mt Gambier Volcano, Australia - John Seach
- ↑ Geology of Mount Gambier: Blue Lake ( Memento of the original from February 20, 2011 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
