Data for: How reliable are tephra layers as records of past eruptions? A calibration exercise
Published: 27 May 2020| Version 1 | DOI: 10.17632/xczg45yfh9.1
Geochemical analysis of tephra samples collected in Washington State in 2018. Thickness measurements of the tephra layer produced by the eruption of Mount St. Helens in May 1980.