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![](./images/clear.gif) 1.- MAGNESIOFERRITE FROM THE CRETACEOUS-TERTIARY BOUNDARY, CARAVACA, SPAIN;
1986
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![](./images/clear.gif) 2.- VOLCANIC ORIGIN OF SOME TONSTEINS AND FLINT CLAYS IN THE U.S.A.;
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MADRID, 1983
CONGRESO INTERNACIONAL DE ESTRATIGRAFIA Y GEOLOGIA DEL CARBONIFERO. 10. ABSTRACTS/1983/MADRID
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