Abstract
Different authors working in the Mediterranean area have reported a distinctive change in the assemblages of keeled globorotaliids coinciding with the FAD of Globorotalia conomiozea Kennett. This change which has now been observed in the Guadalquivir basin consists of the abrupt disappearance of the “ Globorotalia menardii” group, which is then replaced by the Globorotalia miotumida group. This event has been found in a number of areas of the Atlantic Ocean and it is proposed that it can be used to recognize the Tortonian-Messinian boundary in this realm where G. conomiozea occurs only sporadically.
Published Version
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