Acta Geologica 27. (1984)

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ACTA GEOLOGICA A QUARTERLY OF THE HUNGARIAN ACADEMY OF SCIENCES Acta Geologica publishes original reports of studies in geology, crystallography, mineralogy, petrography, geochemistry and paleontology. Acta Geologica is published in yearly volumes of four issues by AKADÉMIAI KIADÓ Publishing House of the Hungarian Academy of Sciences H-1054 Budapest, Alkotmány u. 21. Manuscripts and editorial correspondence should be addressed to Acta Geologica H-1363 Budapest P.O. Box 24 Subscription information Orders should be addressed to KULTURA Foreign Trading Company H-1389 Budapest P.O. Box 149 or to its representatives abroad