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Título: | Serpukhovian coral assemblages from Idmarrach and Tirhela Formations (Adarouch, Morocco) |
Autor: | Rodríguez, Sergio CSIC ORCID CVN ; Said, Ismail; Somerville, Ian; Cózar, Pedro CSIC ORCID; Coronado, Ismael CSIC ORCID | Palabras clave: | Palaeoecology Biostratigraphy Rugosa Mississippian Palaeogeography Tabulata |
Fecha de publicación: | 2016 | Editor: | Geologica Belgica | Resumen: | The Serpukhovian coral assemblages from Idmarrach and Tirhela formations (Adarouch, Morocco) have been studied. They yielded quite diverse assemblages with a total of 32 rugose and 1 tabulate species. The distribution of corals in the sections Idmarrach 1, 2, 3, and 4 and Tirhela 1 and 2 has been established, which include Serpukhovian and Bashkirian rocks. The Serpukhovian assemblages are composed mostly of species that have their higher abundance in the upper Viséan. However, most of the recorded taxa in Adarouch have been already mentioned in Serpukhovian rocks from Britain, Moscow Basin, Urals, Donets Basin and other North African regions such as Tindouf and Béchar. Thus, their stratigraphic range is not expanded. The coral diversity is mainly concentrated in biostromes from the Idmarrach 1 section. However, the high total diversity is due to the combination of favourable depositional settings and a mixture in different beds of several ecological environments, such as coral shoals, protected lagoons and microbial mounds. Most Serpukhovian species have been recorded in areas from the western Palaeotethys previously mentioned. The total assemblage can be considered as typical for the late Mississippian in the western Palaeotethys. However, a small degree of isolation is registered by the absence in the Serpukhovian from Adarouch of the genera Lonsdaleia, Actinocyathus, Tizraia and Kizilia that have been recorded in other North African basins. That fact may be explained by the incipient rising of some areas as ‘highs’ due to the start of the collision between Gondwana and Laurasia. | Versión del editor: | http://dx.doi.org/10.20341/gb.2015.019 | URI: | http://hdl.handle.net/10261/135064 | DOI: | 10.20341/gb.2015.019 | ISSN: | 1374-8505 | E-ISSN: | 2034-1954 |
Aparece en las colecciones: | (IGEO) Artículos |
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GB_2016_19_29.pdf | 15,92 MB | Adobe PDF | Visualizar/Abrir |
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