Fig. 3From: Retrograde alterations of phyllosilicates in low-grade metapelite: a case study from the Szendrő Paleozoic, NE-HungaryMicrostructural features of slate samples from borehole Gn-1, indicating the depth of each sample (photos b–f). For comparison a typical phyllite of pelitic-silty origin from the locus classicus of the Szendrő Phyllite Formation (borehole Szendrő Sz-22) is also shown (a). For explanation see the text. +N crossed polarsBack to article page