Open Access
Table 1
Summary table of outcrops sampled in the Amellagou Region, High Atlas Mountains, Morocco.
| Outcrop | Stage & ammonite chronozone | Depositional environments represented | Coordinates | References |
|---|---|---|---|---|
| Dromedary biostrome | ?Hettangian–Sinemurian | A coral biostrome (2.5 m thick), autochthonous and not reworked, composed of silicified corals included in a mudstone matrix. It is sealed by mudstone to wackestone limestones with abundant black cherts. | N 31.92705 W 4.99234 |
Sarih, 2008 |
| Serdrar reef | Upper Sinemurian End at Oxynotum Chronozone | A pinnacle coral reef (220 m high), located in an open marine environment on a tilted block head, drowned during the Sinemurian (Oxynotum to Raricostatum Chronozones) and progressively capped by lower offshore deposits. | N 32.0075 W 4.9453 |
Sarih, 2008; Lachkar et al., 2009; Pascault, 2018 |
| Castle olistolith | Upper Sinemurian or lowermost Pliensbachian | Olistoliths corresponding to decametric-scale coral bioherms that initially developed on the platform margin but large blocks cracked off and were redeposited in deeper water. These olistoliths are now embedded in hemipelagic limestones and marls interstratified with calciturbidites and slump deposits. | N 31.9414 W 4.9585 |
Sarih, 2008;Sarih et al., 2018, Stone et al., 2022 |
| Owl olistolith | Carixian (lower Pliensbachian) Transition from Ibex to Davoei Chronozones) | N 31.9334 W 5.0019 |
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