Etude stratigraphique, pétrographique et diagénétique des grès d ...

tel-00534181, version 1 - 9 Nov 2010
(a)
(c)
(e)
Chapter I
Sm
Ic
Ic
pal clast-support (Nemec and Steel, 1984). This facies represents low strength pseudoplastic grain flows or lag
deposit (Miall, 1977; Horton and Schmitt, 1996; Miall, 1996).
- Facies Gcu. This is a facies composed of ungraded, clast-supported gravel-pebble conglomerate
containing a matrix of coarse, dark-brownish grey sandstone. The quartz pebbles are rounded to surrounded
and are 3 to 10 cm in diameter. The facies is represented in the LSF by bed LPR 80/04 which occurs in the
middle of the formation and in the bed LPR 153/04 towards the top of the type-section (Figs. 10b and 18c). In
50
(b)
(d)
(f)
Fl
Sh