Formation of chocolate-tablet boudins in a foreland fold and thrust belt: A case study from the external Variscides (Almograve, Portugal)

► The paper deals with chocolate-tablet boudins well exposed in 3D. ► The boudin aspect ratio (ca. 3) is the same in horizontal and vertical sections. ► Vertical and horizontal fractures of neck domains developed in sequence. ► Boudinage occurred during progressive shortening close to the metamorphic peak.