Fig. 3
From: Volcanic crystals as time capsules of eruption history
Timeline of intrusion of Mt. Etna plumbing system with primitive magma recognised as zones enriched up to 103 ppm Cr in clinopyroxene crystals. In eccentric eruptions (red circles; right column), at least ~70% of crystals record magma intrusion. In central conduit eruptions (blue circles; left column), intrusion was minor in the 1990s and 2000s but is increasing in the present decade, correlating with the increase in eruptive activity. ‘Intruded crystals’ include antecrysts with Cr-rich rims and phenocrysts with Cr-rich cores (Supplementary Table 4; Supplementary Data 1)
