Table 1

Sedimentary facies in the studied outcrops.

Facies Lithology Sedimentary structures Bioclastic and other components
1 Black shales to silty shales Massive (F1.a) to laminated (F1.b) Ammonites
2 Grey shales to silty shales Massive (F2.a) to laminated (F2.b) /
3 Green silty shales Massive (F3.a) to laminated (F3.b) Trigoniids
4 Siltstones / /
5 Fine-grained sandstones Massive, some normal grading
Planar lamination
Rare mud clasts
6 Sandstones Massive. Flute casts, crude planar laminations /
7 Sandstones Massive Scarce vertical burrows and bivalve's fragments
8 Sandstones Massive with internal deformation, scarce planar lamination /
9 Sandstones Cross-bedded Scarce bivalves, bivalve fragments, mud clasts
10 Sandstones Planar laminations Scarce bivalves
11 Sandstones Wave ripples Scarce bivalves
12 Sandstones Trough cross-stratification Scarce bivalves
13 Sandy limestone Cross-beds Burrows, mud clasts
14 Sandstones Sigmoidal cross-bedding, lenticular bedding, wavy bedding, flaser bedding Scarce bivalve's fragments, mud clasts
15 Green very fine-grained marly sandstones to marls / Scarce bivalves and bivalve's fragments
16 Sandy limestone Trough cross-stratification Abundant. Bivalves on tops, Trigoniids, and bioturbation
17 Sandstones Massive Fragments of trigoniids, pholadomya, scarce ammonites/ammonoids and undifferentiated bivalves.
18 Sandy limestones Massive and channelized, rare planar lamination at the tops. Bivalve fragments
19 Sandstones Massive /
20 Limestones Mottled, crude lamination Lucinidea, Pholadomya, undetermined bivalves and occasionally scarce oysters
21 Sandstones Bird's eyes Abundant bivalves and scarce gastropods
22 Sandy limestones Bird's eyes Abundant bivalves and scarce gastropods
23 Amalgamated sandstones Trough cross-stratification, planar lamination. Rare erosive bases /

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