Grottes et karsts de Chine
Sur les traces de Xu Xiake

Liang Feng Dong- ‘Triangle Cave’- 25.289110°, 105.537041°

Liang Feng Dong or ‘Triangle Cave’ Is located approx. 5km west of the Anhe Doline and 3.9km NE of Liang Feng Dong (Dapo) ‘Concrete Cave’. Anecdotally Concrete Cave and Triangle Cave are linked making further exploration of both of these a tantalising prospect.

Triangle cave was found early on in the expedition and a cursory look confirmed that it was a substantial entrance passage with a good draught. Other prospects in the area meant that exploration of Triangle Cave was left until the penultimate day.

The large entrance passage narrows after approx. 100m and continues at large proportions for a further 200m before degrading into a network of tall, narrow rift passages, many of which still remain unexplored. It was on the way out of the cave after running out of time that a steep and very slippery mud slope was climbed to reveal a further way on behind large fallen blocks. The passage behind the blocks reached over 60m upwards and light could be seen entering somewhere near the top. The exploration of this northward trending passage was cut short when the team were extremely pushed for time but it was left open at a corner turning to the west.

There were several areas within Triangle Cave where pools of water could be reached below the main cave development. Most notably were those found by climbing through a complicated choke into the base of a large surface shaft. In this area thorough exploration of the lower water filled passages would require swimming or the use of a boat.

Triangle cave is most memorable for the extremely thick, glutinous mud which covers the floors of most passages. A trip into the cave will result in a lengthy cleaning job.