Figure 1. Depositional schema showing the origin of deep scoured hyperpycnal sandstone bodies. In 1 the arriving of the leading head starts the accumulation of sandstone deposits. In 2, the high velocity in the flow centre 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., 2006a.