Gallery
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"Shallowing upward" cycle in the middle Lias of the high Atlas (Morocco). Algal dolomitized laminations on top.
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"Shallowing upward" cycles in the lagoonal Lias of the Musandam Peninsula. (N-Oman).
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"Shallowing upward" liassic cycles arranged in decametric sequences, Musandam Peninsula, (N-Oman).
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"Shallowing upward" cycle in the Middle Jurassic (Saghtan form.) of the jbel Laghdar Range (Oman).
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Desiccation figures on top of a regressive sequence; Middle liassic, High Atlas, Morocco.
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Ammonites and belemnites washed over a supratidal surface (calcretes and "teepees"); Middle Liassic of the High Atlas, Morocco.
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Hurrican breccia cemented (early diagenesis) at the surface of a bed, top of a regressive, metric, sequence. Middle Lias, High Atlas.
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Vadose ferrugenous pisolites (soil) and coastal (tempestite) sediment with birdseyes in an outer platform environment. Aerial diagenesis. Middle liassic, High Atlas, Morocco.
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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.
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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.
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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.
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Giant dinosaur tracks (sauropod) on top of a regressive sequence, Middle Liassic, High Atlas, Morocco.
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Traces dino Tabant.jpg
Parallel dinosaurs tracks on top of a regressive sequence, Middle Liassic, High Atlas, Morocco.
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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.
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Autocyclic filling (metric to hectometric) sequences in the Middle Liassic lagoon, South (Todhra) of the High Atlas, Morocco.
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"Teepee" structure, due to increasing sediment volume by dolomitisation on the inner platform supratidal flat. Top of emersive cycle. Middle Lias, High Atlas.
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Quaternary to recent equivalent of a "shallowing upward sequence", cores in a Tunisian "chott", intertidal laminations in yellow.
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Recent "teepee" structures in a Tunisian salt lagoon, "chott".
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Recent equivalents of "shallowing upward sequences", cores in a Tunisian salt lagoon, "chott".
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Top of a regressive sequence with algal laminations (yellow) and crystallised gypsum, salt lagoon "chott", Tunisia.
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Eolian bioclastic (calcareous algae and porcellaneous foraminifera) sand dune on Tunisian shore.
Read more about this topic: Carbonate Platform
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