Abstract Volcanic ash layers are important markers for the chronostratigraphy of paleoclimate and paleoenvironmental archives at southern tip South America. However, this requires that tephras well-dated. We report geochemical data from stalagmite MA1 formed in a non-karst cave near Mt. Burney volcano southernmost Patagonia (~53°S). High-resolution LA-ICP-MS analyses, SEM imagery, EPMA data, Na...