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Cryptic coral-crinoid "hanging gardens" from the Middle Devonian of southern Morocco

Michal Jakubowicz, Blazej Berkowski and Zdzislaw Belka
Cryptic coral-crinoid "hanging gardens" from the Middle Devonian of southern Morocco
Geology (Boulder) (December 2013) 42 (2): 119-122


An unusual and exceptionally well preserved cryptic community of cnidarians, crinoids, sponges, and microbes developed in a submarine cavity of Middle Devonian age in the Hamar Laghdad area (Morocco). The biota encrusted the cavity roof and grew predominantly in an upside-down position, forming spectacular "hanging gardens." The investigated assemblage differs strikingly from both its Paleozoic and modern analogues; it constitutes one of a very few known examples of fossil cryptic assemblages developed in relatively deep water settings, and is the first report of a cryptic paleoecosystem dominated by rugose corals. The results support the view that during the middle Paleozoic there was no distinct polarization between open-surface and cryptic faunas in deep-water environments, but keen competition for space already existed in Devonian cryptic assemblages. The regional species pool seems to have been the main determinant of the ecological succession and structure of this cryptic community.

ISSN: 0091-7613
EISSN: 1943-2682
Serial Title: Geology (Boulder)
Serial Volume: 42
Serial Issue: 2
Title: Cryptic coral-crinoid "hanging gardens" from the Middle Devonian of southern Morocco
Affiliation: Adam Mickiewicz University, Poznan, Poland
Pages: 119-122
Published: 20131213
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 32
Accession Number: 2014-004475
Categories: Invertebrate paleontology
Document Type: Serial
Bibliographic Level: Analytic
Annotation: GSA Data Repository item 2014032
Illustration Description: illus.
N31°04'60" - N31°40'00", W04°15'00" - W03°45'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 201404
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