The pebbles at this site are primarily composed of hard volcanic rock types like andesite, rounded by years of constant wave erosion.
The coastal terrace here provides evidence of the ongoing tectonic collision between the Philippine Sea Plate and the Eurasian Plate.
Local regulations prohibit the removal of any pebbles from the beach to maintain the site's geological integrity.
The beach is located within a geologically active zone where the coastline is slowly rising, creating tiered terraces visible in the topography.
礫石灘 (Jihui Pebble Beach) is a unique geological site in Chenggong Township, Taitung, characterized by its shoreline composed entirely of smooth, polished pebbles rather than sand. The beach is a protected part of the East Coast National Scenic Area and is renowned for the distinct clicking sound pebbles make as waves retreat. The site features a sea terrace landscape formed by historical tectonic uplift, which is a hallmark of Taitung's coastline. It provides an unobstructed view of the Pacific Ocean and is geologically linked to the nearby Sanxiantai area. The beach is not for swimming due to strong currents and steep drop-offs into deep water. Visitors often use the site as a strategic stop for coastal geology observation while traveling along Highway 11.
From the raised observation deck or the top of the pebble bank looking toward the horizon to capture the contrast between the dark stones and the blue ocean.
Wear sturdy, closed-toe footwear, as walking on loose, shifting pebbles can be difficult and tiring.
Bring a pair of polarizing sunglasses to reduce the glare from the Pacific Ocean waves on the light-colored stones.
Keep a safe distance from the water line, as the shoreline features a steep gradient and unpredictable 'sneaker waves'.
Do not attempt to swim or wade in the water, as the steep beach profile leads to dangerous deep-water drop-offs immediately offshore.
Do not remove stones; pack out all trash to keep the natural environment pristine.
