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Swiss Journal of Geosciences
Fig. 6 | Swiss Journal of Geosciences

Fig. 6

From: Middle-Late Jurassic syndepositional tectonics recorded in the Ligurian Briançonnais succession (Marguareis–Mongioie area, Ligurian Alps, NW Italy)

Fig. 6

a Calcari di Rio di Nava black laminated lime mudstone facies. The dark lime mudstones are characterized by a pervasive closely spaced layering, generally less than 1 cm thick (Porta Biecai 2 section). Pencil is about 15 cm long. b Close up of the boundary between the black laminated mudstone and a thin bed of lithoclastic breccia. Note the wrinkling of the laminae below the larger clasts. Pencil for scale (Porta Biecai 2 section). c Calcari di Rio di Nava oncoidal-bioclastic wackestone facies. Photomicrograph of tubular structures referable to Cayeuxia that locally occur as oncoid nuclei (Fascia section). d, e Calcari di Rio di Nava lithoclastic rudite facies. d Sharp erosional base of a lithoclastic-rudite-facies bed, incising the underlying oncoidal-bioclastic wackestone facies. Pencil for scale (Porte Biecai 1 section). e Poorly stratified, poorly sorted breccia showing a matrix- to clast-supported texture and a polymictic composition. Hammer head is 18 cm large (Masche section)

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