Lake Light Hill

　　 Lake Light Hill is situated 20 kilometers southwest of Zhanjiang City and 4 kilometers northwest of Huguang Town, within the administrative area of Xiashan District in Zhanjiang. The Lake Light Hill National Geopark includes Lake Light Hill itself, as well as Jiaoyi Ridge to its northeast, Zhanjiang Ocean School to the east, Zhanjiang Sugar Factory to the south, and the area from Shangouhou to Gongqiao Village to the west, extending north to the South Subtropical Crops Research Institute, covering an area of approximately 22 square kilometers. The geopark primarily features volcanic crater and surrounding circular volcanic hill geological formations.

　　 The volcanic crater lake is nearly circular, measuring 1.9 kilometers at its longest from east to west and 1.4 kilometers at its widest from north to south, with an area of about 2.30 square kilometers. It is divided into two parts: the smaller East Lake and the larger West Lake. The water surface is at an elevation of 23 meters, while the lake bottom is at 1.0 meter, with a maximum depth of 22 meters (measured in March 1997). The water temperature gradually decreases from the surface to the bottom, ranging from 27°C to 17°C. The water quality is relatively good, clear and transparent. The circular volcanic hills form a closed ring around the crater lake, with elevations ranging from 40 to 90 meters. These hills are mainly composed of volcaniclastic rocks, and often feature steep cliffs on the side facing the lake, while the outer sides have gentle slopes.

　　 Approximately 150,000 years ago, a volcanic eruption at Lake Light Hill created a depression that later filled with water to form the lake. The erupted deposits are remarkably well-preserved, with clear flow structures visible. Post-lithification, these deposits have been affected by faulting, evidence of which is abundant and readily observable, providing substantial material for the study of volcanogenic rock formation and neotectonic movements. Lake Light Hill is one of the more typical "maar lakes" discovered in China and is quite rare in the world. The maar lake here has sediment deposits up to 50 meters thick at the bottom, accurately recording changes in paleoclimate and paleoenvironment over the past 100,000 years or more. It serves as an excellent site for studying maar-type volcanic eruptions and the formation mechanisms of maar lakes in China.

　　Website: http://www.hgytravel.com/