Vol. 15 Núm. 1 (2008)

Cover Photo: A clastic-carbonate sequence of Lajas Formation (Hettangian-Callovian, Neuquén basin) at Puesto Gregor, 50 km SSE from Zapala, Neuquén Province, Argentina. At the middle of the outcrop a thin dolomitic bed bearing a Zn-Pb mineralization, is shown as a light medium grey bed. Photo: Mirta Garrido.