Vol. 27 Núm. 2 (2020)
Cover Photo: Tabular layers of sands and gravelly sands with upper flow regime horizontal lamination interbedded with muds with ripple cross-lamination in a floodplain environment. Valentín Formation, Ullum-Zonda valley, San Juan Province, Argentine Republic (for further details see Blanc et al., pp. 125-162, this issue).