In this figure from the Science Advances paper, you can see the deformed rocks that the researchers sampled. In (A), metabasalts are exposed as foliated layers with red mudstone filling the space in between. In (B), the remnants of easily dissolvable minerals with the metamorphic rocks reveal a lack of foliation. In (C), you can see a reduction in silicon concentration within solution seams, caused by the dissolution of albite. In (D), you can see very fine grains of chlorite, prehnite and magnetite. And in (E), asymmetric stress shadows around titanite indicate noncoaxial shear within dissolved minerals. Photo credit (A): Å. Fagereng, Cardiff University; Rest – Tulley et al., Science Advances (2020)