Contents
Availability of mineral resources for society.
J. G. Price y J. A. Espí
3-29
Quaternary volcanism in Deception Island (Antarctica):South
Shetland Trench subduction-related signature in the Bransfield
Basin backarc domain.
C. Galé, T. Ubide, M. Lago, A. Gil-Imaz, I. Gil-Peña, J.
Galindo-Zaldívar,J. Rey, A. Maestro y J. López-Martínez
31-52
New documentary data from the Geominero Museum (the Spanish
Geological Survey, Madrid) on the archaeocyathan collection from
the Ermitas Hill of Cordoba.
A. Perejón, S. Menéndez, I. Rábano y E. Moreno-Eiris
53-63
Conodont biostratigraphy of the middle Darriwilian (Ordovician)
in the eastern flank of the Villicum Range (Eastern
Precordillera, Argentina).
A. Mestre
65-76
Hydrogeological characterization of the Nador Plio-Quaternary
aquifer,Tipaza (Algeria).
A. Bouderbala, B. Remini y A. Pulido-Bosch
77-89
The problems of overexploitation of aquifers in semi-arid areas:
characteristics and proposals for mitigation
T. Rodríguez–Estrella
91-109