Ichnodiversity and facies of Triassic red beds in the Irohalene area (Argana Basin, Western High Atlas, Morocco): implications for palaeoenvironment

Zouheir, Tariq; Hminna, Abdelkbir; Saber, Hafid; Klein, Hendrik; Lagnaoui, Abdelouahed; Voigt, Sebastian; Rmich, Aziz; Schneider, Joerg W.; Lucas, Spencer G.

doi:10.1080/08912963.2022.2069018

Cited by 8 publications

(3 citation statements)

References 123 publications

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“…This locality spans the upper part of the Timezgadiouine Formation and the lowermost Irohalene Member (Carnian), which conformably overlies the Aglegal Member of the Timezgadiouine Formation (Fig. 1E) (Zouheir et al 2017, 2019, 2022).…”

Section: Geographic and Geological Settingmentioning

confidence: 86%

“…We prefer therefore a subaerial origin and deposition as a sheet flood caused by a very strong (?catastrophic) rainfall, which washed together from the land surface mainly coprolites made by terrestrial tetrapods (79%) and the tree trunks. The coprolites made by fish and (semi) aquatic tetrapods may have originated from eroded sediments of ponds and small lakes, as they are known from about 15 m higher up in the section as well as from eroded fluvial deposits (Zouheir et al 2022).…”

Section: Depositional Setting Of the Coprolite-bearing Horizonmentioning

confidence: 99%

“…The Irohalene Member consists mainly of mudstone, siltstone and sandstone, interpreted to have been deposited in distal alluvial fan to alluvial plain and flood plain to playa mudflat environments by ephemeral rivers and lakes (Zouheir et al 2022). The evident cyclicity, especially in the lower Irohalene Member, was driven by both tectonic and climatic conditions (Zouheir et al 2022).…”

Section: Geographic and Geological Settingmentioning

confidence: 99%

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Laurussian-Aspect of the Coprolite Association From the Upper Triassic (Carnian) of the Argana Basin, Morocco

Zouheir

Hunt²,

Hminna

et al. 2023

Palaios

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A large collection of vertebrate coprolites derives from a debris flow conglomerate in the Upper Triassic Irohalene Member (Carnian) of the Timezgadiouine Formation, northern Argana Basin, Morocco. The coprolites are classified into 14 different morphotypes (MA to MN) based on their size, shape, and surface texture that are divided into three groups: striated coprolites; spiral and scroll-like coprolites; and non-spiral coprolites lacking striations. The great variety of morphotypes suggests the coprolites correspond to a variety of terrestrial and aquatic carnivorous producers. The carnivore coprolites lithified rapidly and were deposited in a high-energy sheetflood. The majority of the coprolites were produced by semi-aquatic and terrestrial tetrapods, with a small percentage produced by fish. The occurrence of Dicynodontocopros, common Alococopros, and some heteropolar forms with affinities to Heteropolacopros, are consistent with a late Carnian age for the Irohalene Member. The Irohalene coprolites are mostly similar to those of the coprofaunas of late Carnian age (Otischalkian–Adamanian) in the lower Chinle Group of the western United States in the co-occurrence of Alococopros and Dicynodontocopros. Significantly, this Moroccan coprofauna from Gondwana has close Laurussian relationships.

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Section: Geographic and Geological Settingmentioning

confidence: 86%

Section: Depositional Setting Of the Coprolite-bearing Horizonmentioning

confidence: 99%