In Guihuamu National Geological Park in Shehong County, you can feel the time in a different way: not in seconds, minutes, or hours, but in millions of years. You will find the plants of Jurassic Period there, including spinulose tree fern, davidia involucrate, gingko, etc.

What's more, the Guihuamu National Geological Park holds the biggest and most complete silicified wood oryctocoenosis in southwestern China. Silicified woods are the remains of plants of Jurassic Period. When the plants like cypress, cycas revoluta, gingko were buried, they would develop into silicified woods due to the lack of oxygen. Silicified woods are distributed from carboniferous period to the cretaceous period.

The silicified woods were firstly discovered in the Longfeng Valley. According to the experts, the park may be a great lake in the Jurassic Period where the trees fell into the lake along the flood and were buried in the sand and developed into the silicified woods.