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Wendt, J. (1993) Steep-sided carbonate mud mounds in the Middle Devonian of the eastern Anti-Atlas, Morocco. Geological Magazine, 130 (1) 69-83 doi:10.1017/s0016756800023736

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Reference TypeJournal (article/letter/editorial)
TitleSteep-sided carbonate mud mounds in the Middle Devonian of the eastern Anti-Atlas, Morocco
JournalGeological Magazine
AuthorsWendt, J.Author
Year1993 (January)Volume130
Issue1
PublisherCambridge University Press (CUP)
DOIdoi:10.1017/s0016756800023736Search in ResearchGate
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Mindat Ref. ID255607Long-form Identifiermindat:1:5:255607:3
GUID0
Full ReferenceWendt, J. (1993) Steep-sided carbonate mud mounds in the Middle Devonian of the eastern Anti-Atlas, Morocco. Geological Magazine, 130 (1) 69-83 doi:10.1017/s0016756800023736
Plain TextWendt, J. (1993) Steep-sided carbonate mud mounds in the Middle Devonian of the eastern Anti-Atlas, Morocco. Geological Magazine, 130 (1) 69-83 doi:10.1017/s0016756800023736
In(1993, January) Geological Magazine Vol. 130 (1) Cambridge University Press (CUP)
Abstract/NotesAbstractDuring the Eifelian and early Givetian, isolated mud mounds were established in a shallow basin, predominantly characterized by calcareous mudstone deposition, in the eastern Anti-Atlas of Morocco. The shapes, lithologies and faunas of these mounds stand in marked contrast with those of nearby contemporaneous, more widespread stromatoporoid/coral biostromes and small carbonate platforms adjacent to shallow shelves. With one exception, the mounds are totally exhumed, perfectly exposing their original morphologies. The smaller mounds are asymmetrical, with steeper northeastern and eastern (35–75°) than southwestern and western flanks (30–50°). The largest mound is almost circular and symmetrical, with scattered stromatoporoids, tabulate and rugose corals that do not form a rigid framework. Frame-builders are much rarer or absent in the smaller mounds. The nature and geographical distribution of the mounds reflects a bathymetric gradient, indicating that they formed on low-angle ramps which sloped gently into a shallow basin. A large reef mound was constructed at moderate depth, while small mud mounds accumulated in deeper water. Decrease of frame-builders and increase in pelagic organisms in the latter document the transition to a pelagic platform with reduced sedimentation at a short distance from the deepest mound.


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