Facies

, Volume 54, Issue 1, pp 1–24

Franken Mound: facies and biocoenoses on a newly-discovered “carbonate mound” on the western Rockall Bank, NE Atlantic

Authors

    • MARUM, Center for Marine Environmental SciencesUniversity of Bremen
  • Lydia Beuck
    • Institute of PalaeontologyUniversity of Erlangen-Nuremberg
  • Sebastian Heidkamp
    • MARUM, Center for Marine Environmental SciencesUniversity of Bremen
  • Dierk Hebbeln
    • MARUM, Center for Marine Environmental SciencesUniversity of Bremen
  • André Freiwald
    • Institute of PalaeontologyUniversity of Erlangen-Nuremberg
  • Olaf Pfannkuche
    • IFM-GEOMAR, Leibniz-Institute of Marine Sciences
  • Xavier Monteys
    • Geological Survey of Ireland, Beggars Bush
Original Article

DOI: 10.1007/s10347-007-0118-0

Cite this article as:
Wienberg, C., Beuck, L., Heidkamp, S. et al. Facies (2008) 54: 1. doi:10.1007/s10347-007-0118-0

Abstract

Cold-water coral carbonate mounds are widespread along the Irish continental margin. Whereas the Porcupine Seabight and the Rockall Trough are relatively well studied with regard to mound topography, coral coverage, and benthic life diversity, the situation on the western Rockall Bank is rather unknown. Detailed facies and biocoenoses mapping based on video footage analyses was conducted on the newly-discovered Franken Mound. Facies were identified ranging between cliff-like to planar hardgrounds and soft sediments that are partly rippled. A variety of biocoenoses are associated with these facies comprising discrete live coral colonies, dense live and dead coral framework coverage, abundant to scattered coral debris, and a soft sediment faunal community, whereas the latter is three times less speciose as biocoenoses containing live framework-building corals. The facies and biocoenosis classes are supplemented by exposed dropstones, lost fishery nets, and rubbish. The distribution of the classes clearly indicates a close relationship with local current effects and current intensification. Due to the dominance of dead coral framework and the partially exposed internal sediment sequences on the mound flanks, it is assumed that Franken Mound is approaching the “mound retirement” mound growth state.

Keywords

Facies Biocoenoses Cold-water corals Carbonate mound Current regime Franken Mound Western Rockall Bank

Copyright information

© Springer-Verlag 2007