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The lower part of the Bellerophon Formation (Upper Permian) includes thin dolomite layers (grey), marls (dark grey) and anhydrites (white) allowing plastic deformation (Neogene compressional folds with southern vergence). The marl layers show pervasive white veins of gypsum at high angle to the bedding, due to remobilization of the anhydrite prior to and during the folds development (Passo Valles, Dolomites, Italy). PhotoID806

The lower part of the Bellerophon Formation (Upper Permian) includes thin dolomite layers (grey), marls (dark grey) and anhydrites (white) allowing plastic deformation (Neogene compressional folds with southern vergence). The marl layers show pervasive white veins of gypsum at high angle to the bedding, due to remobilization of the anhydrite prior to and during the folds development (Passo Valles, Dolomites, Italy). PhotoID806

Photograph: Dario Zampieri

Reference: MASSIRONI M., PRETO N., ZAMPIERI D., Note illustrative della Carta Geologica della Provincia di Trento, scala 1:25.000. Tavola 45 III – S. Martino di Castrozza. Provincia Autonoma di Trento, Servizio Geologico, Firenze: S.EL.CA., 2007.