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Wulong Karst

Wulong Karst
Wulong Karst, an important part of South China Karst, is situatedat the lower reaches of the Wujiang River southeast of Chongqing. It was named as a world natural heritage by UNESCO in 2007. Wulong Karst features spectacular karst landscapes, including the three main parts of Lotus Cave, Three Natural Bridges and Houping Giant Doline (Houping Tiankeng).

Wulong Karst is a valuable treasure that nature created. It is a cluster of several karst landscapes, consisting of gorges, natural bridges, caves, eroded dolines, shafts and underground streams. These karst landforms developed in the carbonate rocks, vividly recording the development and evolution of karst terrain in the Three Gorges area since Pleistocene Era. Lotus Cave, Three Natural Bridges and Houping Giant Doline are the three representative karst landforms, developing under the condition of intermittent uplifting movement of the earth.

Each of the three karst systems standing alone forms a spectacular landscape. The Lotus Cave abounds with various karren sediments forming many splendid natural wonders. The limestone sediments are also of great significance in scientific study. The three natural bridges constitute the largest natural bridge cluster in Asia, and the natural karst bridges are quite high and grand, a sight rarely seen anywhere in the world. Houping Giant Doline is the prime example and the largest tiankeng cluster formed by erosion in the world, and the longest underground cavern system in Asia.

Compared with Stone Forest Karst in Yunnan and Libo Karst in Guizhou, Wulong Karst is located in a relatively remote area away from the impact of human activity. Therefore, Wulong Karst retains its original features of karst landforms that have been despoiled elsewhere, hence its outstanding universal value.

Three Natural Bridges
Karst CaveThree Natural Bridges is located 20 kilometers (12 miles) southeast of Chongqing City in Wulong County. It is a rare geological wonder and an eco-tourist's delight. It features three natural karst bridges: Tianlong Bridge, Qinglong Bridgeand Heilong Bridge. The three natural karst stone arch bridges, with an averageheight of over 200 meters (656 feet), and an average span of over 200 meters(656 feet), constitute the largest natural bridge cluster in Asia.

The three natural bridges are situated in a 1.5 kilometer (12 mile) - long gorge. They evolved due to tectonic uplift and the erosion by underground water. Some parts uplifted forming the bridges, and others collapsed to form karst pits. Therefore, the unique landscape of 'Three Natural Bridges enclosed with Two Pits' is solely nature's creation.

Tianlong Bridge is about 200 meters (656 feet) in height, 100 meters (328 feet) in width. It spans 450 meters (1,476 feet), and has two arches from south to north. The south arch was also called Mihun Cave. The northern arch is a passage. Qinglong Bridge is about 350 meters (1,148 feet) high, 150 meters (492 feet) wide, and spans over 400 meters (1,312 meters). After the rains, a waterfall pours over the bridge and forms a mist. When the sunset reflects on the mist, a colorful rainbow emerges like a dragon ascending to the heaven. Heilong Bridge has a deep and long arch passage, like a black dragon winding its way out from the passage. Heilong Bridge is also renowned for its four springs with tortuous trickles of stream. The Three Natural Bridges is a karst stone arch bridge cluster unrivalled elsewhere of Asia in terms of height and the thickness of the bridge surface. It is magnificent.

Furong Cave, Wulong KarstLotus Cave (Furong Cave), located on the bank of the Lotus River, in Jiangkou Town, Wulong County, is the only cave in China that was listed in 'World Natural Heritage List'. Lotus Cave, together with Mammoth Cave in the US, and Graemes Cave in France, was named one of 'The Three Greatest Caves in the World'.

It is a large limestone cave, formed in the carbonate rocks of Cambrian-Ordovician Period. Furong Cave is abundant with various speleothems, which shape the dazzling karst landscapes.

Lotus Cave is about 2,700 meters (8,858 feet) long, enclosing an area of 37,000 sq meters (44,251 sq yards). There are 100 species of sediment varying from carbonate to sulphur and over 300 scenic spots in the cave. The Glory Hall, covering an area of 11,000 sq meters (13,156 sq yards), is the most spectacular. The magnificent stelae, stalagmites and stalactites are splendid and astonishing to the eye. The huge stone waterfall and curtain are 15 meters (49 feet) in width and 21 meters (69 feet) in height, which are quite grand. The palm-shaped stalagmites are as smooth as jade. The texture of the stalagmites is delicate and pure, which is rare elsewhere. The red coral and calcite are very precious.

The accumulation and breakage of stalagmites records the evolution of the limestone in the cave. Numerous and varied speleothems demonstrate the amazing force of nature. The beautiful scene is a wonder that nature created. Professor Zhu Xuewen, the chairman of the China Cave Association, sings high praise to Furong Cave. He sees it as 'a bright-colored and splendid underground arts palace'.

In 1993, Lotus Cave was discovered by local farmers, and was opened to the public in June 1994. It was appraised as 'one of the best caves open to tourists in the world' by Mr. Andy, the Vice Chairman of World Cave Association.

Houping Giant Doline
Houping Giant Doline (Houping Tiankeng) is situated at Houping Town, 88 kilometers (55 miles) from Wulong County. It is the first tiankeng cluster type of erosion discovered in the world.

A tiankeng refers to a karst doline or sinkhole, measuring at least 100 meters (328 feet) in depth and in diameter. Based on the cause of formation, tiankengs can be divided into two types: collapsed tiankengs and eroded tiankengs. Collapsed tiankengs are common, while eroded tiankengs are quite rare. The Houping Tiankeng cluster is the finest example of an eroded tiankeng.

The Houping Giant Doline developed in the soluble limestone of Ordovician Period. It is an integrated karst ecosystem, consisting of gorges, dolines, shafts and underground caves, which demonstrate the various stages of the evolution of karst terrain.

Covering a total area of 150,000 sq meters (179,398 sq yards), the Giant Doline is mainly composed of five smaller tiankengs. Located in a primitive forest, the five tiankengs well preserve the features of karst landforms. The cylindrical tiankengs are huge, measuring about 300 meters (984 feet) both in diameter and depth. At the bottom of tiankengs, there are spacious underground caves, in which larger tiankengs hide. Among the five tiankengs, Qingkou Tiankeng is the most typical one. It has integrated morphologic features, providing strong evidence of geological evolution. The pithead takes an oblong shape, and has a depth of about 300 meters (984 feet). From an overview from the pithead, the tiankeng seems to be boundless and beyond measurement. From a view from the bottom of the tiankeng, the steep walls extend to the vault of heaven. The floating white clouds and azure sky make visitors they have escaped from earthly triviality.

The Giant Doline cluster, endowed with so many wonders by nature, is not only a tourist draw, but also an ideal place for scientific study of the geological evolution. Explorers from both at home and abroad have been drawn here.


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