Neubenennungen lithostratigraphischer Einheiten in der helvetischen Kreide (Schweizerisches Komitee fuer Stratigraphie (Swiss Journal of Geosciences, 102/2) Comment on the article by the Schweizerisches Komitee fuer Stratigraphie (SJG, Vol 102/2) What is in a stratigraphical name?

摘要

The two newly defined lithostratigraphic units - the Rohrbachstein and Plaine-Morte Beds - within the recently reinstated Gruenten Member (former "Upper Orbitolina Beds") embody characteristic lithostratigraphic units, which are well distinguishable in the field. They furthermore bear significant paleoceanographic information in that they document the final drowningrnepisode of the Schrattenkalk carbonate platform (Rohrbachstein Bed) and overlap with oceanic anoxic event la ("Selli event": Plaine-Morte Bed). Their use is in line with a long-standing tradition to name individual phosphate- and glauconite-containing marker beds and is fully justified with respect to the Swiss guidelines of stratigraphical nomenclature (Remanc et al. 2005).