The primary coastline of the port was bedrock embayment and composed of mesozoic granite .
三亚港原始岸线为基岩港湾海岸，由中生代花岗岩构成。
A coastal embayment at the w side of william scoresby archipelago , 5 mi long and 3.5 mi wide , with shores marked by steep rock headlands and snow-free hills rising to 210 meters .
The abrupt change from valley floor to mountain , lack of embayment of the mountain front , and the wineglass canyon , all point to recent activity on this fault zone .
