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Hard coral cover on the Great Barrier Reef (GBR) is on a trajectory of decline.
However, little is known about past coral mortality before the advent of long-term monitoring (circa 1980s).
The rock art and the associated natural scenery at 38 sites located in the Zuojiang River valley, in the southwest of Guangxi Zhuang Autonomous Region, southern China, were inscribed recently on UNESCO’s World Heritage List. Huashan is probably the largest known rock art panel in the world, consisting of approximately 1900 identifiable figures and occupying an area of approximately 8000 m. Huashan, 56 secondary carbonate layers above and below the paintings were studied for their mineralogy, oxygen, and carbon isotopic compositions and dated by the Th/U dating results demonstrate that ages of the rock paintings can be bracketed between 1856±±41yr BP corresponding to the middle to the end of the Eastern Han dynasty (AD 25 to 220).
The results imply that the rock painting practices at Mt.
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