The dogger reef horizons of the Moroccan Central High Atlas: New data on their development

Capturing and modelling metre‐scale spatial facies heterogeneity in a Jurassic ramp setting (Central High Atlas, Morocco)

“…, 2002; Pierre, 2006). Compilation of previous studies in the region: ‘a’Pierre, 2006; ‘b’Ait Addi, 1998; ‘c’Ait Addi, 2006; ‘d’Poisson et al. , 1998; ‘e’Milhi et al.…”

“…, 2009). In comparison, relatively few studies have investigated the Upper Carbonate Platform Complex (Sadki, 1992; Ait Addi, 1998, 2006; Poisson et al. , 1998; Milhi et al.…”

“…Stanley (1981) proposed that these topographic highs, which were characterized by shallow‐water deposits, represented the crests of tilted blocks. During the Aalenian–Lower Bajocian, the second crustal extensive event associated with a relatively high sedimentary supply triggered a change of the platform geometry from a rimmed platform into a ramp platform observed toward the east of Rich city (Stanley, 1981; Ait Addi, 2006). During the same period, toward the west of Rich city, the south margin of the High Atlas rifting basin remained stable and recorded two progradations of an oolitic carbonate ramp, the Amellago and Assoul formations, toward the basin (Hadri, 1993; Pierre et al.…”

“…, 2004). In this context, sub‐basins are characterized by a decrease in water circulation and oxygenation compared with the topographic highs (Stanley, 1981; Ait Addi, 2006). Bioclastic floatstones (Lf 6) occur at the top of depositional packages, probably as the result of winnowing during a period of low accommodation (Wilmsen et al.…”

The oldest Gondwanan record of the extinct durophagous hybodontiform chondrichthyan, Strophodus from the Bajocian of Morocco

“…The upper Agoudim Formation corresponds to the Agoudim Members III and IV, whose stratigraphic range is early to probably late Bajocian (Ait Addi, 2015;Bodin et al, 2017). While the Agoudim Member III consists of shaly marls with intercalated micritic and bioclastic limestones, the overlying Agoudim Member IV is composed of bioclastic limestones rich in brachiopods, serpulid worm tubes, bryozoans and algae, and shaly marls, marly limestones and limestones, as well as coral patch reefs with an abundant and diverse neritic biota, comprising bivalves, gastropods, brachiopods, echinoderms, serpulid tubes, sponges and bryozoans, as well as algae (Ait Addi, 2006, 2015.…”