10 GEOLOGICAL MEMOIHS. 



1855 and 1856 explored the environs of Cilly, by order of the Geo- 

 logical Society of Styria, he had the opportunity of studying other 

 Tertiary deposits, connected with those of Sotzka. These last have 

 been found to belong to an important series spreading far through 

 Southern Styria, and contaimng several known Eocene forms besides 

 undescribed species. The well-known Eocene locality of Oberburg 

 aiforded Fusus subcarinatus, Lam., Natica Vulcani, Brongn., iV. 

 perusta, Brongn., &c., together with Corals, also of Eocene date, such 

 as Astrcea {Siderastrcea) rotundata, Cat. By its extent and its mode 

 of stratification, the Eocene deposit of Oberburg is intimately con- 

 nected with other Styrian deposits regarded as Eocene. Younger 

 Tertiary beds also occur in the same district, but unconnected with 

 those before mentioned, and containing only Upper Miocene shells, 

 especially Melcmia Escheri, found also at Mulhouse (Alsatia), St. 

 Gallen (Switzerland), and Ulm (Wirttemberg), and often in Southern 

 Styria and Carinthia, and important in indicating the comparative 

 age of the Tertiary beds, as it is wanting in the Lower Tertiaries 

 and abundant in the Newer. 



Prom this Dr. Eolle concludes that a considerable hiatus, not 

 permitting the union of the lower with the upper deposits, exists 

 between the Sotzka strata and the Upper Miocene beds with Melania 

 Escheri, Brongn. This opinion is supported by the nature of the 

 fossiliferous strata of Presberg (Styria), first investigated by Dr. 

 Eolle. These contain plant-remains demonstrative of contempora- 

 neity with the Sotzka strata, such as Araucarites Sternhergi, Goepp., 

 Podocarpus Eocenita, Ung., Cinnamomum lanceolatum, Ung., Banksia 

 Haeringiana, Ettings., Eugenia Apollinis, Ung., &e. The shells 

 found by Dr. Eolle in the Presberg strata were undescribed, except 

 Oerithium dentatum, Defr., characteristic of the Oligocene (Upper 

 Eocene and Lower Miocene) deposits of Jeurre, near Paris, and 

 Weinheim, near Mayence, and indicative of an horizon lower in posi- 

 tion than the beds "svith Melania Escheri. 



It is therefore highly probable that there are in Southern Styria 

 two principal Tertiary subdivisions not connected by mutual trans- 

 itions. The Sotzka strata represent the lower of these, probably 

 corresponding to those of Jeurre, Yersailles, Weinheim, &c. ; or per- 

 haps they are somewhat older, — a question still unsettled. They are 

 certainly not higher than these, nor, as asserted by Prof. Heer, do 

 they correspond with the lower freshwater Molasse of Switzerland, 

 characterized by the presence of Melania Escheri, Brongn. 



[Count M.] 



On the EAiLROAD-sECTioiq' between Laibach and Tkieste. 

 By Dr. Stache. 



[Proceed. Imp. Geol. Instit. Vienna, June 1858.] 



The town of Laibach is built on Upper Carboniferous (Gailthal) 

 strata, which are overlaid near Ober-Laibach by Upper Triassic 

 (Eaibl) beds, partly abounding with Megalodon Garinthiacus, Cor- 

 bula Rosthorni, and other characteristic bivalves. The thick layers 



