Archaeologists specializing in dating techniques have announced a major refinement in the chronology of the Nilgiri Hills megalithic landscape. Published in Archaeometry, the study introduces a novel Lead-210/Polonium-210 isotopic disequilibrium methodology that allows for the high-resolution dating of inorganic soil binders used in ancient agricultural terraces. This technique has pushed back the earliest phase of systematic step-terrace engineering in the Western Ghats to approximately 5200 BCE.
The research suggests that Neolithic communities in Southern India were practicing advanced slope-stabilization and water-management techniques nearly two millennia earlier than previously estimated. This new dating resolution provides critical data for understanding the transition from foraging to specialized horticulture in the tropical montane ecosystems of the Indian peninsula.