Sandun Tujia Township, Xuanhan County, Dazhou City, Sichuan Province

Sandun Tujia Township

Sandun Tujia Township belongs to Xuanhan County, Dazhou City, Sichuan Province. In September 2005, the former Sandun township was transformed into Sandun Tujia Township, which governs the administrative region of the former Sandun Township, and the township government is located in sandunpo.

brief introduction

In April 2007, more than 1000 Tiankeng groups were found within a 10 square kilometer area of the township. Dayan village in Sandun township is a huge Tiankeng. According to geological experts, Tiankeng, geologically known as karst funnel, is a common karst landscape in limestone developed areas.

Local anecdotes

In April 2007, more than 1000 Tiankeng groups were found within a 10 square kilometer area of the township. Dayan village in Sandun township is a huge Tiankeng. According to geological experts, Tiankeng, geologically known as karst funnel, is a common karst landscape in limestone developed areas.

The Tiankeng of Dayan village has a diameter of more than 1000 meters. The edge of the Tiankeng is surrounded by knife like cliffs, forming a deep "shaft", which is connected with the underground Yinhe River and karst cave. It is deep and long, falling stones, colliding with the pit wall, and the sound lasts for a long time. The Tiankeng in group 8 of Dayan village, which is called "Longkeng" by the local people, covers an area of about 100 square meters. It was originally a winter paddy field.

According to local people, one afternoon a few years ago, the water in the field suddenly whirled wildly. In the blink of an eye, the field disappeared and became a deep and unpredictable pit. In the past few years, the water in the pit has not been reduced due to drought, and the rainstorm has not increased.

Liu Xincai, a geology professor at Chengdu University of technology, explained: "the Xiaozhai Tiankeng in Chongqing is the number one in the world. However, more than 1000 tiankengs have been found within a radius of 10 square kilometers in Sandun Township, Xuanhan County, which is rare in the world. So far, so many Tiankeng groups have not been reported, so they have high exploration value and tourism value. "