Stratigraphy of Lower Cambrian and unconformable Lower Carboniferous beds from the Valls unit (Catalonian Coastal Ranges)

The Palaeozoic rocks outcropping around Valls are divided into two strati g raphic units. The boundary between both is an unconformity. The lower unit is composed by nearshore platform sediments and a Lower Cambrian age is ind icated according to ichnotaxa content. The upper unit consists of pink nodu lar limestones and dark limestones, and it is followed by siliciclastic Cul m Facies rocks. These limestones contain conodonts of the Uppermost Tournai sian at its base (anchoralis-latus Zone) and Lower Bashkirian (Namurian B) in the upper part. This condensed carbonate sequence was coeval with the th ick siliciclastic Culm sedimentation in the surrounding areas. (C) 2000 Aca demie des sciences / Editions scientifiques et medicales Elsevier SAS.