Orjen
Orjen
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Orjen

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Orjen

Orjen (Serbian Cyrillic: Орјен, pronounced [ɔ̂rjɛn]) is a transboundary Dinaric Mediterranean limestone mountain range, located between southernmost Bosnia and Herzegovina and southwestern Montenegro.

Its highest peak is Veliki kabao, which stands at 1,895 m (6,217 ft). The Orjen Peak is the highest peak in the Sub-Adriatic Dinarides. The massif of Orjen lies east to south-east of Trebinje in Bosnia and Herzegovina and north-west of Risan in Bay of Kotor (Boka Kotorska). From the town of Risan, situated at the innermost protected part of the bay, a well-engineered road, at first metalled, with many hairpin bends climbs to about 1600 m, over to the interior. At the main summit of Orjen and the surrounding ridges and high plateaus the action of quaternary glaciation is evident. During the Ice Age, long valley glaciers receded from Orjen to the Bay of Kotor and surrounding poljes. Hollowing U-shaped valleys and cirques in their course. Glaciers also shaped jagged peaks and ridges. Glacial and karst type relief combine now in a unique coastal scenery. There are few places elsewhere in the Mediterranean which demonstrate similar phenomena.

The Natural and Culturo-Historical Region of Kotor is a UNESCO World Heritage site, comprising the territory between Orjen and Lovćen, including all the small towns in the bays of Risan and Kotor with their natural setting. With this privileged natural harbour the Bay of Kotor has been settled for millennia. Illyrians[citation needed] and Greeks[citation needed] colonised the coast from 400 BC and established today's ports Risan (Rhizon) and Kotor (Cattaro). Due to lack of potable water, the high mountain was never densely populated. Snow patches collected from deep pit holes were used even late in the 20th century to provide the few hamlets with water. Today, wells are used instead.

Mount Orjen is a block mountain lifted up as a horst and thus towering above the lowered Bay of Kotor and the high karst plateaux surrounding the Mount Orjen horst. With 1895 m difference between the lowest and the highest point, relief energy has a great role in the extremely harsh environment. A hyperkarstic barren landscape of vast karren fields contrasts with very species rich vegetation types, ranging from evergreen deciduous forests at lower altitudes to endemic calcareous Dinaric Fir and Pine forests in higher altitudes. Precipitation reaches 5000 L per m2, amounts typical for tropical rainforests or the eastern Himalayas than the dry Mediterranean. Lying at Europe's wettest coast, snow easily accumulates on karstic plateaux and as late as June small snow patches continue to lie in shaded places under the summits. Skiing is possible but no relevant infrastructures exist today. Orjen is a more important hiking destination. Three mountain huts provide basic accommodation.

Orjen comprises transboundary area of about 400 km2 between Bosnia and Herzegovina and Montenegro, and runs for 25 km from region around Trebinje in Bosnia and Herzegovina in the north-west, to Bay of Kotor in Montenegro in the south-east. Mount Orjen is composed of four high karstic plateaux divided by ridges. Three near parallel ridges collide in Veliki kabao, Orjens' culmination point. The ridges are arranged by elevation with the highest to the north screening the Bijela gora plateaux from the Mediterranean coast. The separated plateaux are the Krivošije to the East, Bijela gora to the North, and Dobri do and Vrbanj to the West. Only few settlements are scattered in surrounding poljes. The poljes of Grahovo, Dragalj, Vrbanj, Krusevica and Grabalj are important for agricultural use and provide the only lines of communication in the karst. Migration circled around Mount Orjen as a major obstacle between the coastal, Herceg Novi and Risan and the interior towns of Grahovo, Trebinje and Nikšić.

Several dry river valleys are found on Orjen. Only in decades they react as short-living rivers when heavy rain and snow-melt combine. Flooding can be a problem and several poljes are renowned for their long inundation periods.

Mediterranean mountains bear no glaciers any more except small snow fields in some shaded cirques of the Taurus range. Even during the pleistocene snowlines were not much lower as in today's Alps. Glaciers were only of local significance in the Mediterranean enabling frost sensitive vegetation types to survive the climate changes of the Quaternary. Among the once glaciated Mediterranean mountains Orjen was outstanding for one of the biggest ice cap in the region. A 150 km2 covered 1/3 of the area. All part above 900 m were buried under a thick sheet of ice from where several glacial tongues descended to 500 m above sea level. Traces of glacial activity are evident in any part of Orjen as in the Bijela gora plateaux. No glacial lakes survive today as they were extinguished due to the porosity of the karstified landscape. Many cirques, U-shaped valleys and moraines and jagged ridges and summits bear the evidence of the glacial erosion.

In Stone Age and Bronze Age humans settled in the Orjen region. This early human activity is depicted by rock paintings of deerhunt and humans in Lipci rock art in Risan bay. A major Bronze Age excavation site is at Popovo polje to the north of Mount Orjen.

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