22 GEOLOGICAL MEMOIRS. 



only about 7 feet thick. It is said to have regained, in some mea- 

 sure, its original thickness afterwards. The coal is a very good brown- 

 coal (Jahrb. d. k.-k. geol. Eeichsanstalt, 1861-62, Yerh. p. 117). 

 The beds there are horizontal, and then dip slightly to the N.W. 

 No trace of fossils was found either in the coal, coal-shale, or the sand 

 and conglomerate. One very important fact was gained, however, 

 namely, that this conglomerate strikingly resembles that of Orlowe in 

 the "Waagthal, in which Exogyra columha occurs abundantly. A 

 bivalve was subsequently met with, during a further examination of 

 the district, in a few specimens of a brownish-yellow marl in the 

 upper part of the conglomerate, in a forest road near Lazi. As, how- 

 ever, they were only in the state of casts, and very much crushed, 

 they might as easily have been taken for a Breissena as for an Ecco- 

 gyra. [As all further endeavours to determine the age of this forma- 

 tion were fruitless, the author refers it for the present to the period 

 of the Chalk, but does not consider this determination definite.] 



General description of the Neogene Strata. — The older formations 

 hitherto treated of, namely, the crystalline rocks, the Triassic beds> 

 the slate of the Yuciak-Thal near Pozeg, with the overlying felspar- 

 porphyry and tuff, and the Pozeg conglomerate, form the Orljava and 

 Pozegan Eanges. Round about them lie the Neogene-tertiary strata, 

 spreading out as far as the Diluvial plain of the Drave and Save. 



Although the author had little previous knowledge of the Neogene- 

 beds in Croatia and Sclavonia, yet he had seen the Belvedere- Schotter 

 conformably displayed near Agram, under which appeared the 

 ** Congerien-Tegel," with Congeria and Cardium, and, as the lowest 

 bed, the Leithakalk, conformable to the older rocks. Between these 

 two, and corresponding to the similar formation in the Vienna Basin, 

 he had completely recognized the identical succession of white and 

 grey marls, sandstone, and shale, with the Cystoscirites Partschii, 

 Sternb., as equivalent to the beds near Eadoboj. The situation of the 

 beds of Eadoboj and Podsused between the above-mentioned Con- 

 gerien-Tegel and Leithakalk determined their correspondence with 

 the Cerithium-beds of the Vienna Basin, and corroborated his opinion 

 of the railway section near Podsused. At that place a block of 

 Leithakalk is so placed between the marl-beds that the lines of 

 stratification of the former are vertical, while the latter are horizontal. 



Still further east, in West Sclavonia, he found that, whenever the 

 succession of the strata was clearly shown, they could be referred to 

 one or the other of the three horizons in the Vienna Basin ; and he 

 considered, though with some doubt, those beds as belonging to the 

 Leithakalk that had a similar appearance. 



The Cerithium-beds in the Vienna Basin contain a brackish-water 

 fauna, in the Hungarian basin a marine, whilst in Croatia and Scla- 

 vonia they constitute for the most part a freshwater series. Still in 

 Sclavonia, at the commencement of this period, Cerithium pictvmiy 

 Bast., and C. ruhiginosum, Eich., existed; but in the overlying 

 " Mergel " and '^ Kalk-mergel " scarcely any fossils are found, except 

 an extremely abundant, though undescribed, species of Planorhis. 



Districts of BenJcovac arid Bogolje. — North of Okucane and west of 



