Vol. 31 No. 1 (2024)

Cover photo: Exposure of Cretaceous fluvial and aeolian volcaniclastic deposits of the Chubut Group at Los Chivos Hill (Somuncurá-Cañadón Asfalto Basin, Chubut, Argentina). Three members with variable volcaniclastic influence are marked by sharp color changes (for further details see Villegas and Umazano, pp. 13-42, this issue)