A timeline in the floor
The Belum Caves are the second-largest cave system in the Indian subcontinent, a 3,229-meter-long network of passages and chambers formed by the Chitravathi River eroding limestone deposits over millions of years. The geological formations are impressive, the most scientifically significant features are on the cave floor. Sediments here contain a layered record of human activity. The Archaeological Survey of India (ASI) has excavated remnants of pottery vessels and dated them to 4500 BC. This confirms a long period of human presence, stretching from the prehistoric era into historical times.
The first official record of the caves was by British geologist Robert Bruce Foote in 1884, but they remained largely unstudied until a German speleological team led by Herbert Daniel Gebauer conducted a detailed exploration between 1982 and 1983. Excavations have revealed a complex stratigraphy. The layered sediments, deposited by the ancient river that once flowed through the cave, have preserved artifacts from different eras in chronological order. Deeper layers contain older objects, while those closer to the surface are more recent. This sequence allows archaeologists to track cultural and technological changes over millennia. Later occupations by Jain and Buddhist monks are also evident from relics found within the caves.