L. Hably szerk.: Studia Botanica Hungarica 18. 1985 (Budapest, 1985)
Kordos-Szakály, Márta: Stratigraphical revision of some Hungarian Badenian-Sarmatian floras
STUDIA BOTANICA HUNGARICA (Antea: Fragmenta Botanica) XVIII. 1985 p. 59-63 Stratigraphical revision of some Hungarian Badenian-Sarmatian floras By M. KORDOS-SZAKÁLY (Received November 30, 1984) Abstract: The so-called "Sarmatian flora" (ANDREÁNSZKY 1959) known from NE Hungary is the richest one among the Hungarian fossil floral assemblages. Among them the impressed remains from the sites Balaton, Buják, Bánhorváti, Mikófalva, Sály.the Paris and Bertece valleys in the vicinity of Nógrádszakái and the older Badenian beds of EgerTihamér are considered as basic floral assemblages. The sequence and chronology of these floras are fairly uncertain, therefore, statistical evaluation (clusteranalysis, GREGOR leaf-type analysis) was chosen in order to define the proper stratigraphical position of the floras (KORDOS-SZAKÁLY 1983). SUMMARY OF PREVIOUS RESEARCH RESULTS ANDREÁNSZKY G. (1955, 1959) studied in details the Hungarian Miocene especially the Sarmatian floras from the paleobotanical point of view. He based the stratigraphical assignment of the layers on the work of SCHRÉTER (1959). However, recent detailed Neogene stratigraphical research based on radiometric data, as well as the chronostratigraphical revision concerning the whole Miocene Paratethys, necessitates the stratigraphical re-evaluation of the basic floras of crucial importance. As it was clear from the previous paleobotanical revision of the floras from the Bertece and Paris-stream valleys near Nógrádszakái, these sites are not Sarmatian, but belong to the Lower Badenian (KORDOS-SZAKÁLY 1983). Based on the frequency of the species acurring in common with those of the site Paris-stream (C sp ) and the radiometrical dates of the Middle and Upper Rhyolite Tuff, the probable sequence of eight Miocene floras were defined (Balaton, Buják, Bánhorváti, Mikófalva, Sály, Paris-stream, Bertece-valley, Eger-Tihamér), and their relative "year-distance" (Fig. 1). CLUSTER ANALYSIS This method is the most frequent and simplest way of numerical classification, a comparison of the Jaccard and SOTensen coefficients by object pairs. The similarity of the fossil floras was calculated by the Jaccard-formula, •R ' jk a + b + c and the Sjarensen-coefficient (PODANI 1980) 2a S PS jk 2a + b + c
