Carbonate Platform - Gallery

Gallery

  • "Shallowing upward" cycle in the middle Lias of the high Atlas (Morocco). Algal dolomitized laminations on top.

  • "Shallowing upward" cycles in the lagoonal Lias of the Musandam Peninsula. (N-Oman).

  • "Shallowing upward" liassic cycles arranged in decametric sequences, Musandam Peninsula, (N-Oman).

  • "Shallowing upward" cycle in the Middle Jurassic (Saghtan form.) of the jbel Laghdar Range (Oman).

  • Desiccation figures on top of a regressive sequence; Middle liassic, High Atlas, Morocco.

  • Ammonites and belemnites washed over a supratidal surface (calcretes and "teepees"); Middle Liassic of the High Atlas, Morocco.

  • Hurrican breccia cemented (early diagenesis) at the surface of a bed, top of a regressive, metric, sequence. Middle Lias, High Atlas.

  • Vadose ferrugenous pisolites (soil) and coastal (tempestite) sediment with birdseyes in an outer platform environment. Aerial diagenesis. Middle liassic, High Atlas, Morocco.

  • Meniscus and point contact cement in a marine grainstone with displaced foraminifera (by tide and hurricans) on the supratidal flat of the middle liassic platform of Morocco. Top of emersive cycle. Middle Atlas.

  • Reworked calcretes concretions from the supratidal environment in a marine (dolomitised) sediment displaced by hurricans on the inner platform flat. Top of emersive sequence. High Atlas, Morocco.

  • Stalactitic cement in sediment from the supratidal zone, vadose environment, top of "shallowing upward" sequence. Middle Liassic, High Atlas. Thin section. L = 0.3 mm.

  • Giant dinosaur tracks (sauropod) on top of a regressive sequence, Middle Liassic, High Atlas, Morocco.

  • Traces dino Tabant.jpg

    Parallel dinosaurs tracks on top of a regressive sequence, Middle Liassic, High Atlas, Morocco.

  • Vadose stalactitic cement filling an horizontal cavity in a marine coastal sediment, outer platform. Birdseyes in the allodapic (tidal or tempestite) grainstone point to an aerial diagenesis. High Atlas, Morocco.

  • Autocyclic filling (metric to hectometric) sequences in the Middle Liassic lagoon, South (Todhra) of the High Atlas, Morocco.

  • "Teepee" structure, due to increasing sediment volume by dolomitisation on the inner platform supratidal flat. Top of emersive cycle. Middle Lias, High Atlas.

  • Quaternary to recent equivalent of a "shallowing upward sequence", cores in a Tunisian "chott", intertidal laminations in yellow.

  • Recent "teepee" structures in a Tunisian salt lagoon, "chott".

  • Recent equivalents of "shallowing upward sequences", cores in a Tunisian salt lagoon, "chott".

  • Top of a regressive sequence with algal laminations (yellow) and crystallised gypsum, salt lagoon "chott", Tunisia.

  • Eolian bioclastic (calcareous algae and porcellaneous foraminifera) sand dune on Tunisian shore.

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