Qingwan Basalt Introduction
The Penghu Islands are primarily composed of basalt, formed by lava repeatedly emerging from underground fissures, cooling and solidifying on the surface. The earliest volcanic lava dates back approximately 18 million years to a calm eruption, with volcanic activity ceasing around 8 million years ago. The basalt in Penghu has created a rugged mountain landscape with steep cliffs, which have developed various unique geological formations due to long-term weathering, wind erosion, and marine erosion. Additionally, the rapid cooling and contraction of lava create tension, leading to the formation of polygonal jointing in the rocks, known as columnar joints. These joints exhibit straight, curved, or sloping orientations, making them the most distinctive feature of the basalt landscape in Penghu. In Magong, on the left side of County Road 201 heading towards Fenggui, one can see the striking Qingwan columnar basalt rising alongside the road. Due to prolonged weathering and erosion, Penghu's basalt displays different appearances, with Qingwan being one of the most visually impressive examples of columnar basalt. In Qingwan, visitors can not only admire the magnificent and solitary basalt formations but also enjoy the coastal scenery. 【Recommended stay time】 1 hour
Qingwan Basalt
