This data comprises various transmitted and reflected light microscopy images, scanning electron imagery, chemical mapping (energy dispersive X-ray spectroscopy), and crystallographic mapping (electron backscatter diffraction) of basalt samples. Basalt cores were taken from the Reykjanes Ridge in the North Atlantic Ocean, during IODP Expedition 395C at four sites, U1554, U1555, U1562, and U1563.

Mush eruptibility and resorption data for Mount St Helens including; - Textural data for plagioclase in crystallisation-resorption experiments - Major element geochemical data for plagioclase and glass synthesised experimentally - Major element and trace element geochemical data for plagioclase phenocrysts from Mount St. Helens volcano - Textural data for plagioclase phenocrysts from Mount St. Helens volcano