Ko Hin Ngam Gravel Beach

         The site is a small elongated islet about 600 meters long and about 150 meters wide. It is made of hornfels, a low-grade metamorphic rock, with a spectacular gravel beach at the northeast tip covering an area about 200×40 square meters. The source of the gravel is a hornfels outcrop on the east of the islet that has been broken up by sea waves into rock fragments then transported along the seashore to accumulate as a gravel beach at the northeast tip. Waves have also acted on the western coast providing the growth of the beach toward the northeast direction.