What if volcanic crystals don’t just record chemistry, but motion? Using crystallographic analysis, we show amphibole reaction rims capture magma flow prior to an eruption: crystals grow aligned, then...

In this study, authors investigate what happens to magma before a volcanic eruption. They find that crystals react to magma flow before it reaches the surface, preserving a mechanical fingerprint of t...

What if volcanic crystals don’t just record chemistry, but motion? Using crystallographic analysis, we show amphibole reaction rims capture magma flow prior to an eruption: crystals grow aligned, then rotate with shear, revealing a hidden mechanical fingerprint and record of magma ascent dynamics.