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Early Devonian actiniarian trace fossils (Conichnus conicus) from the Anti-Atlas of Morocco


Klug, Christian; Hoffmann, René (2018). Early Devonian actiniarian trace fossils (Conichnus conicus) from the Anti-Atlas of Morocco. Neues Jahrbuch für Geologie und Paläontologie:65-74.

Abstract

Shaly and marly sedimentary rocks of late Lochkovian to Pragian and latest Emsian age yielded carbonatic conical structures several centimeters in size. These are filled with a coarse-grained bioclastic sediment with concentric conical fill-structures. We interpret these structures as the trace-fossil Conichnus, which usually is interpreted as a trace of soft-bottom dwelling sey-anemones (Actiniaria). These findings show that soft-bodied coelenterates were a common element of benthic ecosystems representing the softground marine Cruziana or Skolithos ichnofacies of the northern Gondwana shelf during the Early Devonian.
Key words: Devonian, Tafilalt, ichnofossils, ichnofacies, palaeoecology.

Abstract

Shaly and marly sedimentary rocks of late Lochkovian to Pragian and latest Emsian age yielded carbonatic conical structures several centimeters in size. These are filled with a coarse-grained bioclastic sediment with concentric conical fill-structures. We interpret these structures as the trace-fossil Conichnus, which usually is interpreted as a trace of soft-bottom dwelling sey-anemones (Actiniaria). These findings show that soft-bodied coelenterates were a common element of benthic ecosystems representing the softground marine Cruziana or Skolithos ichnofacies of the northern Gondwana shelf during the Early Devonian.
Key words: Devonian, Tafilalt, ichnofossils, ichnofacies, palaeoecology.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Paleontological Institute and Museum
Dewey Decimal Classification:560 Fossils & prehistoric life
Scopus Subject Areas:Physical Sciences > Paleontology
Language:German
Date:2018
Deposited On:25 Oct 2018 08:25
Last Modified:29 Jul 2020 07:55
Publisher:Schweizerbart
ISSN:0077-7749
OA Status:Closed
Publisher DOI:https://doi.org/10.1127/njgpa/2018/0767

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