Past and present proglacial sedimentary systems record valuable information about critical phases of the Earth’s climatic history. Although glacial outburst-related sedimentation has been identified in proglacial outwash systems, the behavior of glacial outburst flows when entering the sea are poorly understood. Here, Girard et al. document an Upper Ordovician proglacial sand-rich delta-front succession preserved in southwestern Libya, exploring how the proglacial delta front responded to sediment and meltwater discharge inputs of varying magnitude and frequency. The observations and interpretations, consistent with Pleistocene analogs, should be applicable to other paleoglaciations, and provide conceptual model for studies on management and vulnerability of groundwater and the development of glaciogenic hydrocarbon reservoirs.
Occurrence of hyperpycnal flows and hybrid event beds related to glacial outburst events in a Late Ordovician proglacial delta (Murzuq Basin, SW Libya) by Flavia Girard, Jean-François Ghienne, and Jean-Loup Rubino