A sinkhole is a hole in the earth's surface caused by the erosion of the ground layer beneath, according to the United Nations Platform for Space-based Information for Disaster Management and Emergency Response (UN-SPIDER). This hole grows over time and can have a diameter ranging from one to 600 me
and its many caverns. what the himalayas are to climbers china is to cavers and speleologists. definitely going down, isn t it? in 911, we had an expedition which went downstream from xiaozhai and explored the cave downstream. and bear in mind, we are cave explorers. what turns us on are huge, spectacular caves. spectacular tiankengs are pretty good, but they re not as good as the wonderful caves. upstream in xiaozhai was more of a challenge, because it had all the water. that was decided that that was the ultimate cave to explore upstream. right, i ll see you later.
for years. the landscape here is an example of karst topography. that means sinkholes, caves and underground streams are common. experts believe the sinkhole was formed by water flowing into the underground rivers from a high altitude, which caused cracks in the landscape that stretched across 37km. this slowly eroded the limestone rock, and so, xiaozhai tiankeng gradually developed. in 1994, the team led by experts andy eavis and zhu xuewen started exploring the sinkhole