Koralpe
Encyclopedia
Austria
Austria , officially the Republic of Austria , is a landlocked country of roughly 8.4 million people in Central Europe. It is bordered by the Czech Republic and Germany to the north, Slovakia and Hungary to the east, Slovenia and Italy to the south, and Switzerland and Liechtenstein to the...
which separates eastern Carinthia
Carinthia (state)
Carinthia is the southernmost Austrian state or Land. Situated within the Eastern Alps it is chiefly noted for its mountains and lakes.The main language is German. Its regional dialects belong to the Southern Austro-Bavarian group...
from southern Styria. Running from north to south, it drains to the river Lavant
Lavant
Lavant was a prince-bishopric, suffragan of the Prince-archbishop of Salzburg, then in the southern part of imperial Austria's Styria. Later the area was re-assigned to presentday Slovenia. It became the Slovenian bishopric of Maribor, a suffragan of the Archbishop of Ljubljana, on 5 March 1962...
in the west, and to the river Sulm in the east. Its highest elevation (2,140 meters) is the Große Speikkogel, a popular hiking destination and also a node for military radar
Radar
Radar is an object-detection system which uses radio waves to determine the range, altitude, direction, or speed of objects. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, weather formations, and terrain. The radar dish or antenna transmits pulses of radio...
airspace surveillance. In the south, towards the Slovenia
Slovenia
Slovenia , officially the Republic of Slovenia , is a country in Central and Southeastern Europe touching the Alps and bordering the Mediterranean. Slovenia borders Italy to the west, Croatia to the south and east, Hungary to the northeast, and Austria to the north, and also has a small portion of...
n border, it is contiguous with the Poßruck mountain range.
The Koralpe consists mostly of metamorphic rock
Metamorphic rock
Metamorphic rock is the transformation of an existing rock type, the protolith, in a process called metamorphism, which means "change in form". The protolith is subjected to heat and pressure causing profound physical and/or chemical change...
, of which some parts are of considerable interest to geologists and to collectors of semi-precious stones. In and around the Weinebene (also a popular recreational and hiking area) there are pegmatitic
Pegmatite
A pegmatite is a very crystalline, intrusive igneous rock composed of interlocking crystals usually larger than 2.5 cm in size; such rocks are referred to as pegmatitic....
strata which contain significant amounts of Spodumene
Spodumene
Spodumene is a pyroxene mineral consisting of lithium aluminium inosilicate, LiAl2, and is a source of lithium. It occurs as colorless to yellowish, purplish, or lilac kunzite , yellowish-green or emerald-green hiddenite, prismatic crystals, often of great size...
, making this area the largest known lithium
Lithium
Lithium is a soft, silver-white metal that belongs to the alkali metal group of chemical elements. It is represented by the symbol Li, and it has the atomic number 3. Under standard conditions it is the lightest metal and the least dense solid element. Like all alkali metals, lithium is highly...
deposit in Europe. Quartz
Quartz
Quartz is the second-most-abundant mineral in the Earth's continental crust, after feldspar. It is made up of a continuous framework of SiO4 silicon–oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall formula SiO2. There are many different varieties of quartz,...
and feldspar
Feldspar
Feldspars are a group of rock-forming tectosilicate minerals which make up as much as 60% of the Earth's crust....
, together with the dense forests, provided the basis for a glass
Glass
Glass is an amorphous solid material. Glasses are typically brittle and optically transparent.The most familiar type of glass, used for centuries in windows and drinking vessels, is soda-lime glass, composed of about 75% silica plus Na2O, CaO, and several minor additives...
and porcelain
Porcelain
Porcelain is a ceramic material made by heating raw materials, generally including clay in the form of kaolin, in a kiln to temperatures between and...
industry in earlier times.
The Koralm Railway
Koralm Railway
The Koralm railway is a proposed 125 km long two track, electrified, high-speed railway link under construction connecting the Austrian cities of Graz and Klagenfurt...
currently under construction will link the provincial capitals of Klagenfurt
Klagenfurt
-Name:Carinthia's eminent linguists Primus Lessiak and Eberhard Kranzmayer assumed that the city's name, which literally translates as "ford of lament" or "ford of complaints", had something to do with the superstitious thought that fateful fairies or demons tend to live around treacherous waters...
and Graz
Graz
The more recent population figures do not give the whole picture as only people with principal residence status are counted and people with secondary residence status are not. Most of the people with secondary residence status in Graz are students...
via the Koralm Tunnel
Koralm Tunnel
The Koralm Tunnel is a railway tunnel under construction in Austria under the Koralpe mountain range. It will be 32,9 km long and up to 1.250 m deep and be a part of the 130 km Koralmbahn linking Graz with Klagenfurt. The tunnel will be composed by two single track tubes linked every 500...
under the Koralpe by 2022.