EVIDENCE OF A GUADALUPIAN AGE FOR THE KHUFF FORMATION OF SOUTHEASTERN OMAN: PRELIMINARY REPORT oleh LUCIA ANGIOLINI, ALDA NICORA, HUGO BUCHER, DANIEL VACHARD, ALAIN PILLEVUIT, JEAN-PIERRE PLATEL, JACK ROGER, AYMON BAUD, JEAN BROUTIN, HAROUB AL HASHMI, JEAN MARCOUX