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Figure 1. Depositional scheme showing the origin of deep scoured hyperpycnal sandstone bodies. In 1 the arrival of the leading head starts the accumulation of sandstone deposits. In 2, the high velocity in the flow center during the flow peak produces a basal erosional surface. In 3 during the flow slackening the hyperpycnal flow fills the previous erosional surface with sandstone accumulations. Modified from Zavala et al. (2006ยช).