tephrochronológia
Tephrochronology is a geochronological method that uses volcanic ash layers, known as tephra, to date geological and archaeological materials. Tephra layers are deposited during volcanic eruptions and can spread over vast areas. These layers contain unique geochemical signatures, such as the chemical composition of the glass shards and mineral inclusions, which can be analyzed to identify the specific eruption event. Once a tephra layer is identified and its eruption source determined, it can serve as a time marker. If this tephra layer is found in association with archaeological artifacts or other geological deposits, it provides a minimum or maximum age for those materials, depending on their position relative to the ash layer.
The process of tephrochronology involves several steps. First, tephra layers are identified in stratigraphic sequences. Then,