Show simple item record

dc.contributor.authorMíguez Salas, Olmo 
dc.contributor.authorRodríguez Tovar, Francisco J. 
dc.contributor.authorde Weger, Wouter
dc.identifier.citationMiguez-Salas, O., Rodríguez-Tovar, F. J., & de Weger, W. (2021). The Late Miocene Rifian corridor as a natural laboratory to explore a case of ichnofacies distribution in ancient gateways. Scientific Reports, 11(1), 1-10. []es_ES
dc.description.abstractOceanic gateways have modulated ocean circulation and have influenced climatic variations throughout the Earth´s history. During the late Miocene (7.8–7.35 Ma), the Atlantic Ocean and the Mediterranean Sea were connected through the Rifian Corridor (Morocco). This gateway is one of the few examples of deep ancient seaways with a semi-continuous sedimentary record. Deposits comprise turbidites intercalated between deep-sea mudstone (i.e., hemipelagites and drift deposits), channelized sandstone contourite facies, and shallow marine sandstone. Herein an ichnological analysis was conducted in these upper Miocene sediments to improve characterisation of palaeoenvironmental conditions. In addition, ichnofacies were analysed to elucidate how bottom currents control ichnofacies distribution and can modify their attributes. Turbidite deposits are typified by vertical trace fossils (i.e., Ophiomorpha), conforming the Ophiomorpha rudis ichnosubfacies. Contouritic sandstone exhibits high density and low diversity trace-fossil assemblage, with predominant Macaronichnus and Scolicia, resembling a proximal expression of the Cruziana ichnofacies. Shallow marine environments are dominated by vertical trace fossils (e.g., Conichnus, Ophiomorpha, Skolithos), allowing an assignation to the Skolithos ichnofacies. This study reveals for the first time a variability in ichnofacies attributes and distribution at the Rifian Corridor, associated with turbidites, contourite and shallow marine sediments. Hydrodynamic energy reveals as the major factor controlling trace maker communities in the studied seaway. Highly energetic conditions typical of shallower settings are present in deeper-water environments (i.e., slope), contributing to ichnodiversity impoverishment in ichnofacies.es_ES
dc.description.sponsorshipSecretaria de Estado de I+D+I, Spain CGL2015-66835-P PID2019-104625RB-100es_ES
dc.description.sponsorshipFEDER Andalucía B-RNM-072-UGR18es_ES
dc.description.sponsorshipJunta de Andalucía P18-RT-4074es_ES
dc.description.sponsorshipScientific Excellence Unit (Universidad de Granada) UCE-2016-05es_ES
dc.description.sponsorshipMinisterio de Educación, Cultura y Deporte (Gobierno de España)es_ES
dc.description.sponsorshipExxon Mobilees_ES
dc.publisherNature Researches_ES
dc.rightsAtribución 3.0 España*
dc.titleThe Late Miocene Rifian corridor as a natural laboratory to explore a case of ichnofacies distribution in ancient gatewayses_ES

Files in this item


This item appears in the following Collection(s)

Show simple item record

Atribución 3.0 España
Except where otherwise noted, this item's license is described as Atribución 3.0 España