Huguangyan is the only maar lake. Maar in English "Maar" from the Latin "mare", meaning that the sea is a special type of closed-end formation of the volcanic crater lake, is the world's rare non-renewable geological resources, is the world's ancient climate, Ancient environmental science "natural Yearbook" and "Museum of Natural History." Currently the world's only found in two Maar Lake, and the other located in Germany. Lake is located in Zhanjiang city 18 kilometers southwest of its area is 4.7 square kilometers, an area of 38 square kilometers protection control, the lake area of 2.3 square kilometers, lake 446 meters deep, in which Mud sediment 420 meters,Water depth of 20 meters, the lake below sea level, floods and droughts do not dry not overflow. Huguangyan not only has high research value, but also the first provincial-level scenic spots, national geological park. Annual number of tourists nearly 100 million people. Lake has built in the Sui Dynasty at the end of SANJHIH Temple and Bai Yian, lakes surrounded by pristine rainforest areas, the mountains there are nearly one hundred kinds of birds and dozens of species of animals, said the lake has a huge fish and turtles, called "God Arowana turtle. " Welcome to Guangdong for Guangzhou Fair, you could go to Huguangyan National Scenic Spot for a trip.
The principal objective of the study is to gain palaeoenvironmental and palaeoclimatological information about sub-tropical Southeast Asia by means of multiproxy analyses of a continental high-resolution sedimentary record. Climatic variations in South China, one of the most densely populated and economically fast growing areas in the world, will have important social and economic impacts. Therefore, studying past climatic variability will give the necessary information to understand future climate change. High resolution studies of sediment sequences from Lake Huguang Maar, a site in a climatologically sensitive setting near the South China Sea, allowed reconstructing palaeoenvironmental and palaeoclimatic variations of the last 75,000 years. A co-operative agreement between GFZ-Potsdam and IGCAS-Beijing has enabled us to complete site surveys and a drilling campaign at Lake Huguangyan, yielding in a total recovery of more than 220 m of lake sediments from different profiles.
According to the scientific survey, Huguang Yan Lake was formed 140,000-160,000 years ago. The 400-meter-thick deposit at the bottom of the lake is of great significance in scientific researches and it is said to be a condensed history of earth’s crust, physics, organism development and nature evolvement. There are also many marvelous scenery and folk stories and inscriptions and poems written by famous people in the history. All of these make the lake a “storehouse of poems and culture”. No wonder a UN expert called the lake a “natural almanac” and a “natural museum” left by the evolvement of the earth in the past thousands of years and a “golden key” to open the earth maze.