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The Longmen Relics Care Agency was established in 1953 under the Ministry of Culture. [3] A 1954 site inventory was undertaken by the newly established Longmen Caves Cultural Relics Management and Conservation Office. The State Council declared the Longmen Grottoes as a national cultural monument needing special protection in 1961.
This list of longest caves by country includes the longest-known natural cave per country. To be listed, the caves must have been surveyed to cave surveying standards , and the results published in reliable sources.
Caves are found around the world. The largest form in areas of karst landforms whose rocks dissolve easily. Preferable conditions for karst cave formation are adequate precipitation, enough plants and animals to produce ample carbon dioxide, and a landscape of gentle hills which drains slowly.
The Schönberg cave system is located at place 14 on the list of the longest caves in the world. [5] Within Europe there are longer systems on the territory of Ukraine (Optymistychna Cave), Switzerland (Hölloch, Siebenhengste-Hohgant-Höhle) and Spain's (Sistema del Alto). It is the 14th longest cave system in the world.
Speleothems inside Optymistychna Cave. The entire cave lies under a 2 km square area in a layer of Neogene period gypsum that is less than 30 metres (98 ft) thick. [7] [9] The passages tend to be fairly small, no more than 3 metres (10 ft) wide and 1.5 metres (5 ft) tall for most, although at intersections they can be up to 10 metres (33 ft) tall. [7]
The Hölloch (English: Hellhole) [2] is a 200.4 km (124.5 mi) long cave in the municipality Muotathal in Switzerland. In addition to being the second longest cave in Europe and the 11th longest of the world, it is also notable for having a depth of 1,033 m (3,389 ft). [1] The Hölloch is an example of a karst cave system. [3]
Middle Binyang Cave (simplified Chinese: 宾阳中洞; traditional Chinese: 賓陽中洞; pinyin: Bīnyáng Zhōng Dòng) is cave number 140 at the Longmen Grottoes near Luoyang, Henan, China. Dimensions
Download as PDF; Printable version; In other projects ... Pages in category "Caves of Europe" The following 5 pages are in this category, out of 5 total.