Researchers at the Global Geochronology Center have announced a significant breakthrough in archaeological dating with the development of a 'Uranium-Thorium' Recrystallization methodology. This technique allows for the precise dating of secondary mineral deposits found directly on the surface of stone tools, a task previously fraught with contamination issues. Applied to Acheulean hand-axes from the Hunsgi Valley in Karnataka, the new method has pushed back the timeline of human occupation in the region to 1.2 million years ago.
This refined chronology places the early hominin expansion into the Indian subcontinent much earlier than previously thought, suggesting that Homo erectus populations were highly adapted to the tropical environments of the Deccan Plateau during the Early Pleistocene. The study, published in the latest issue of Chronological Research, provides a new standard for dating surface-found artifacts in arid and semi-arid landscapes globally.