Articles

Editor

Lluís Cabrera

1

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Constraints on alluvial clay mineral assemblages in semiarid regions. The Souss Wadi Basin (Morocco, Northwestern Africa)

Ahmed Elmouden, Lhoussaine Bouchaou, Maria Snoussi

3

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Dissolution of minor sulphides present in a pyritic sludge at pH 3 and 25º C

Jordi Cama, Patricia Acero Salazar

15

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U-Pb dating of Ordovician felsic volcanism in the Schistose Domain of the Galicia-Trás-os-Montes Zone near Cabo Ortegal (NW Spain)

Pablo Valverde-Vaquero, Alberto Marcos Vallaure, Pedro Farias Arquer, Gloria María Gallastegui Suárez

27

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Palaeogene Charophytes of the Balearic Islands (Spain)

Carles Martín-Closas, Emilio Ramos Guerrero

39

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First Caribbean Floricomus (Araneae: Linyphiidae), a new fossil species in Miocene Dominican Republic amber. A new synonymy for the extant North American fauna

David Penney

59

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Discussion and reply: The Cambrian System in Northwestern Argentina: stratigraphical and palaeontological framework Discussion

Luis Buatois, María Gabriela Mángano

65

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Reply

Guillermo F. Aceñolaza

73

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