Field data including geological map with sample locations, sample description, thin section images, Electron Backscatter Diffraction (EBSD) and Energy Dispersive X-ray Spectrometry (EDS) data. Field work and targeted sampling took place, in May 2023, around the exceptional field exposure of an interpreted Slow Earthquake zone in Col d’Amoss, New Caledonia. This data has come into existence through research funded by the NERC Grant NE/X012778/1 Exploring the geological signature of Slow Earthquakes through legacy experiments and field analysis.

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.