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天生桥是难得一见的地质奇观,因为它的形成决定于地质、气候、水源等多方面的条件。一般来说,当地下水长期作用于石灰岩,便形成了地下溶洞。当地下溶洞形成以后,又经过地壳的隆升作用,原来的溶洞顶端便成了“桥面”,溶洞的空间部分便成了桥洞。一座“天生桥”就这样在沧桑岁月的磨蚀中诞生了。我国最大的“天生桥”群位于重庆市武隆县,每座桥平均海拔300米以上,桥面跨度在500米以上。单个最大的“天生
The Tianshengqiao is a rare geological wonder because its formation depends on many conditions such as geology, climate and water resources. In general, when groundwater acts on limestone for a long time, underground caverns are formed. After the formation of underground caverns, and through the uplifting effect of the earth’s crust, the top of the original cavern becomes a “bridge deck”, and the space part of the cavern becomes a bridge hole. A “birth bridge” was born in the erosion of years of vicissitudes. China’s largest “Natural Bridge” group is located in Wulong County, Chongqing. The average elevation of each bridge is more than 300 meters, and the bridge spans more than 500 meters. Single largest "born