Qingwan Basalt Introduction
The Penghu Islands are primarily composed of basalt, formed by lava repeatedly erupting from underground fissures and cooling on the surface. The earliest volcanic lava dates back to around 18 million years ago during a tranquil eruption, which ceased volcanic activity approximately 8 million years ago. Penghu's basalt has created a square mountain terrain with steep cliffs on all sides. Over time, due to weathering, erosion, and marine processes, various unique landforms have developed. Additionally, the rapid cooling of lava often causes tension in the rock, leading to the formation of polygonal columnar joints, with fractures exhibiting straight, curved, or various inclined directions. This becomes the most distinctive feature of the basalt landscape in Penghu. In Magong, on the left side of County Road 201 towards Fenggui, you can see the towering green bay columnar basalt by the roadside. The basalt in Penghu presents different appearances due to prolonged weathering and erosion, and Green Bay is one of the most remarkable examples of columnar basalt. In Green Bay, not only can you admire the magnificent and independent basalt formations, but you can also enjoy the coastal scenery. [Recommended stay time] 1 hour.
Qingwan Basalt
