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Brief introduction of limestone mountain
1. Limestone Mountain

Jiuzhaigou: World Natural Heritage, National Key Scenic Spots, National AAAAA Tourist Area, National Nature Reserve, National Geopark and World Biosphere Reserve Network. It is the first nature reserve in China with the main purpose of protecting natural scenery.

Jiuzhaigou is located in Jiuzhaigou County, Aba Tibetan and Qiang Autonomous Prefecture, Sichuan Province. It is located in the transition zone from Qinghai-Tibet Plateau, Western Sichuan Plateau and mountainous areas to Sichuan Basin, more than 300 kilometers south of Chengdu. It is a ravine with a depth of more than 50 kilometers, with a total area of 64,297 hectares and a forest coverage rate of over 80%. There are 9 Tibetan villages in the ditch, including Shuzheng Village, Yehe Village and Zechawa Village, all located in this alpine lake group.

Jiuzhaigou National Nature Reserve mainly protects rare animals such as giant pandas and golden monkeys and their natural ecological environment. There are 74 species of rare plants under state protection, 8 species of animals under state protection/kloc-0, and rich fossils and ancient glacier landforms.

Returning from Jiuzhai without looking at the water is the true interpretation of Jiuzhaigou scenery. There are 108 Haizi in springs, waterfalls, rivers and beaches, which constitute a colorful jade basin in Yaochi. The six landscapes of Changhai, Jianyan, Nuorilang, Shuzheng, Zharu and Black Sea are Y-shaped. Cuihai, Waterfalls, Cai Lin, Xuefeng, Navy Blue and Lan Bing are called the six wonders. The magical Jiuzhai is called the fairy tale world and the king of water features.

2. Why are limestone mountain walls black?

Tanxian Gorge is a national scenic spot with the highest elevation of1342m and the lowest elevation of 380m. It is a typical karst mountain area with dense vegetation, pleasant climate and beautiful environment.

Tan Xianxia, located in the southeast of Wanzhou District, Chongqing, is a national-level scenic spot. It is a canyon scenic spot composed of limestone, with a total area of 69 square kilometers, of which the forest area is 32 1 10,000 mu, and the forest coverage rate is 64.7%. It is integrated with Wang, the city nature reserve of the kingdom of rare animals, plants and insects in the Three Gorges reservoir area. The water potential in the middle gorge changes with the seasons, and summer is the most important. Some canyon parts can be used for boating and recreation. The water in midsummer is clear and pollution-free. Every time the gorge water touches the mountain wall, it becomes a pool. There are 48 pools in the canyon, each of which is a natural swimming pool.

3. limestone caves

There are many soft people, because it is the only cave in the world listed as a world natural heritage. Furong Cave is a huge cave with rich sediments.

Furong Cave is a large limestone cave, which was formed in the Quaternary Pleistocene (about 654.38+200,000 years ago) and developed in the dolomite limestone of Cambrian. The stable temperature in the depth of the cave is 16. 1 degree. The main cave of Furong Cave is 2700 meters long, the sightseeing road is 1860 meters long, the bottom width is 12- 15 meters, and the maximum width is 69.5 meters. The height of the cave is generally 8-25m, and the highest is 48.3m, with a total construction area of 37,000m2, of which Jinxiu Hall covers an area of10000m2, which is the most spectacular.

4. Limestone mountain area

Black lime soil, also known as humus carbonate soil, is a kind of lime (rock) soil.

Soil rich in calcium carbonate and humus grows on limestone parent materials in tropical and subtropical regions.

Scattered in tropical and subtropical limestone mountain areas, common in rocky mountain tops, crevices in rock walls or low-lying valleys. Generally, the soil layer is thin, and it is mostly A-C profile structure. The leaching effect of calcium carbonate is weak, and it often appears in the profile in the form of pseudohypha, white powder or nodules. The surface organic matter content is 6-7%, and the soil is dark and sticky, but the granular or nuclear granular structure is developed. Neutral to alkaline reaction, pH6.5-8.0. The basic saturation is usually 60% GTC. The silica-alumina ratio of the particles is about 2.4-3.6, and the clay minerals are mainly hydrated mica and montmorillonite. The content of potassium oxide is about 3%, and the content of free iron oxide is only 8-9%. This is a relatively young calcareous (rocky) soil.

5. What are the limestone mountains?

The formation of karst caves in limestone area is the result of long-term erosion of groundwater in limestone area. Insoluble calcium carbonate in limestone can be converted into

6. Are there rockeries and stalagmites on the limestone mountain?

Stalagmites are not living things. Stalagmite is calcium carbonate limestone, located in the sharp cone at the bottom of karst cave, which is a natural phenomenon in karst terrain. It is a kind of limestone, which does not conform to the seven characteristics of life, so it is not a living thing.

Stalagmites are precipitated by calcium carbonate dripping from stalactites into the water at the bottom of the cave, which grows from bottom to top. Stalagmites and stalactites grow slowly, with a history of about 10 thousand years and a height of one meter.

7. limestone mountains

Hongshui River Basin is high in the north and low in the south, with an altitude of 900- 1600 meters in the north and 230-300 meters in the southern valley.

The whole basin is dominated by mountains, with mountains accounting for 82% of the total area and hills accounting for 18%. Hongshui River Basin in Guizhou is located in the slope of Yunnan-Guizhou Plateau, which is an ancient planation plane in the basin period. Due to the intermittent rise of the Quaternary crust and the development of water system, the plateau suffered from the degradation of the epidermis, and the landform was characterized by sand shale erosion and funnel injection of limestone peak-cluster mountains and roads. The exposed strata include Ordovician, Silurian mud, basins, Carboniferous, Permian, Triassic, Paleogene and Quaternary. Carboniferous, Permian and Triassic strata are the main strata, and other strata only appear in local areas. Limestone is widely distributed and karst is developed. Most tributaries flow into the main stream several times, including karst scenic springs and peak forest depressions. The rich reach has a drop of tens of meters to hundreds of meters, which is the dominant reach for developing small and medium-sized hydropower stations. Underground mineral deposits include coal, barite, iron and sulfur.

8. Limestone mountain spring water

Hail God is a natural high-quality mineral water, and its water source is Hail Spring, one of the eight scenic spots in Anqiu.

This spring is located on the east side of Yimeng Mountain. The spring water is blocked and filtered by layers of limestone and granite, and spews out from the bottom of a kilometer. Hundreds of miles of pollution-free, pure and sweet water are rich in various minerals and trace elements needed by the human body.

9. What is limestone mountain?

1. Distribution characteristics of limestone

Limestone is mainly formed in turbulent shallow sea environment and needs warm climate conditions. Its preservation also needs suitable temperature, humidity, air pressure and certain stratum structure. Guangxi, Guizhou and eastern Yunnan in China are one of the largest karst areas in the world, and their strata contain huge limestone resources. In addition to the above areas, there are also large areas of limestone in Guangdong, Zhejiang, Fujian, Jiangsu, Sichuan Basin and mountainous areas in western Hubei.

2. Formation environment of limestone

The formation process of limestone is long, mainly in shallow sea environment. When there is a closed geographical environment (such as lakes, lagoons, bays, etc.). ), dry climate conditions, water evaporation exceeds supply, and there is salt supply, evaporation and deposition will occur.

10. Limestone Mountain

The rocks in Funiu Mountain are not limestone.

Funiu Mountain has a huge scale, and the mountains are extremely tall and majestic, mainly granite mountains. Among them, the northwest section of the mountain is wide and complete, and the mountain is high and majestic, so it splits to the southeast, and the mountain gradually becomes low and scattered, becoming a low hill. The northwest section of the mountain range is roughly located in the northwest of Baihe, Erlangping and Shuanglong. It is one of the large concentrated distribution areas of Zhongshan in the province.