Archaeologists and physicists at ETH Zurich have announced a revolutionary dating technique using Cosmogenic Argon-37, allowing for the sub-annual dating of organic materials found in anaerobic environments. The pilot study applied this methodology to Neolithic pile dwellings in the Swiss Alps, refining the construction dates of several underwater structures to within a single growing season. This level of precision reveals a much faster rate of social and architectural evolution than was previously detectable with standard radiocarbon dating.
The study demonstrates that the 'Lake Dwelling' communities underwent rapid expansion during specific five-year windows of climatic stability. By measuring the ultra-trace levels of Argon-37 isotopes trapped in waterlogged timber, the team was able to distinguish between trees felled in early spring versus late autumn, providing a unprecedented look at the logistical rhythms of Neolithic construction projects. This breakthrough is expected to transform the study of submerged archaeological sites globally.