Guanling Glacial Potholes: 🌋 A "Mars Crater" from 3 Million Years Ago
“Downstream from Huangguoshu Waterfall, in a wild karst valley in Guanling County (Anshun, Guizhou), there's a riverbed covered in thousands of perfectly round stone pits carved by ancient glaciers around 2–3 million years ago.”@_Iris · 4 days ago