Supplementary Figure 1 Macromorphological appearance of the some collected rocks
(hand samples): I – Siltstone; II – Typical pyroclastic rock, highlighting the zones
accumulation of lithic fragments (dotted yellow trace); III - Pyroclastic rock,
highlighting the zones accumulation of lithic fragments (dotted yellow trace) and zones
cemented by calcium (yellow arrow); IV – Granodiorite. Micromorphological (optical
microscope photomicrograph) appearance of the: a – siltstone in parallel nicols,
highlighting the fracture filled by Fe-micromass; b - siltstone in crossed polarized light;
c - siltstone in parallel nicols, highlighting the parallel and perpendicular fractures; d siltstone in parallel nicols, highlighting the some dissolution features in dotted yellow
trace (irregular edges, bays and alveoli); e - pyroclastic rock in parallel nicols,
highlighting the plagioclase (pg), quartz (qz) and phlogopite (ph) phenocrysts; f pyroclastic rock in crossed polarized light; g - pyroclastic rock with a microcrystalline
calcium matrix in parallel nicols (left) and crossed polarized light (right); h - pyroclastic
rock in parallel nicols with oriented matrix formed by pumice-flow; i and j - pyroclastic
rock in parallel nicols highlighting the presence of oxidation zones in the matrix
associated by biological colonization (dotted yellow trace); k – granodiorite in parallel
nicols highlighting the presence of plagioclase (pg), amphibole (am), quartz (qz) and Kfeldspar (mc); l – granodiorite in crossed polarized light highlighting the corroded
minerals.