Picture 6.2.1:

Example of the GdAI facies association from the Lac du Lauzanier area. Interbedding of very fine-grained sandstones, siltstones and shales, illustrating the several upper divisions of the Bouma sequence (tc - tet) (Figure 6.1.1d). Very fine-grained, rippled sandstones are relatively lighter coloured compared with the laminated siltstones and shales.