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| Location: | In Ravne, 10km from Cerkno. Leave Highway Ljubljana-Postojna at Logatec or Unec |
| Open: |
closed. [2003] |
| Fee: |
closed. [2003] |
| Classification: | Limestone cave, Mid Triassic Lombardic limestones and dolomitic breccia. |
| Light: | electric. |
| Dimension: | A=703m a.s.l. |
| Guided tours: | D=20min, L=352m, VR=20m. |
| Bibliography: | |
| Address: |
Mestni Muzej Idrija, Prelovceva 9, 65280 Idrija, Tel: +386-65-71135 Jamarski klub Srecko Logar, Ljubljanska 5, P.P. 1, 65280 Idrija |
| Last update: | $Date: 2007/11/10 22:52:00 $ |
| early 19th century | founded by Martin Celik. | |
| 1833 | closed with a wall. | |
| 1956 | rediscovered by Dr. Roman Slavnik et al.. |
Ravenska Jama was discovered in the early 19th century by the local Martin Celik. But after two storms in 1832 and 1833, the cave entrance was closed by a wall. Because of the cold air from inside the cave, the people thought the cave was responsible for the storms.
Italian Speleologists and memberes of the Cerkno section of the mountaineering club tried to find this cave between the two World Wars, but did not succeed. It was finally rediscovered by a group lead by Dr. Roman Slavnik in 1956. Subsequently the cave was developed and opened to the public.
The geological situation of the cave is really special. A small area of limestone is surrounded by various volcanic rocks like porfirs, porfirits, keratofirs, and volcanic tuffs. The cave formations are extraordinary too, which is a result of the special geological situation. Most formations consist of aragonite instead if calcite. The chemical formula is identical for both minerals, but the geometry of the crystals is much different. And so the spelethems also look much different.
The aragonite crystals are thin, fragile and very white. They are often shaped like needles and up to 10cm long. The bunches of crystal needles are called Aragonite Hedgehogs by the guides.
Ravenska Jama appears in many guidebooks and has some recommendation. But it is now closed for several years. The rather remote location may be a problem, the cave is not profitable. It is only a few hundred meters from the highway to Cerkno, but unfortunatly it is also a few hundred meters higher than this road, and the only access is a 10km long narrow, winding and steep road. The owners opened the cave in the only possible way under this circumstances: they gave visitors the key for self guided tours. Unfortunately many visitors used the absence of a guide to vandalize the cave. As a result the cave is now closed completely. However, we included this page in the hope that it may be opened again in a few years.
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