214 



c. Blue marly shale, sand, &c. The carboniferous strata are sur- 

 mounted by dark-coloured marls inclosing well preserved shells, 

 many of which are identical with species found in the London clay 

 and Calcaire grossier, amongst which are Lutraria oblata, Lucina 

 mutabilis and L. renulata, Venus vetula, Cerithium thiara, Bulla 

 cylindrica, &c. 



d. Conglomerate, with micaceo-calcareous sand and millstone con- 

 glomerate. This group is of very great development, and occupies 

 all the hilly region of the Sausal. 



e. Coralline limestone and marl. The preceding group is seen, both 

 atEhrenhausen andWildon on the Mur, to pass under a hard, mottled, 

 coralline limestone of a yellowish white colour, which at the latter 

 place forms a cap several hundred feet thick in beds nearly hori- 

 zontal. The fossils seem to be of the age of the English Crag 

 and middle Sub-apennine formations, and include many corals of the 

 genera Astrea and Flustra, Crustacea, Balanus crassus, Conus Al- 

 drovandi, Pecten infumatus, Pholas, Fistulana, &c. The authors com- 

 pare this coralline limestone with the tertiary marble of Possagno 

 near Bassano, and they also observe that it far exceeds in magnitude 

 the secondary coral rag of England. 



f. White and blue marl, calcareous grit, white marlstone, and con- 

 cretionary white limestone. The Mur in its easterly course from 

 Ehrenhausen, exposes all the members of this and the following group, 

 although some of them are still better seen in transverse sections to 

 the south. At Santa Egida, concretionary white limestone, alternating 

 with marls, contains Pecten pleuronectes, Ostrsea bellovicina, Sca- 

 laria, Cyprsea, &c. and in the Zirknitz-thal, Echinanthus marginatum 

 with gigantic oysters and pectens. At St. Kunegund and Morgruben 

 the white marls graduate into a compact building-stone undistin- 

 guishable from the clunch or lowest chalk of Cambridgeshire. Near 

 Mureck on the right bank of the Mur, the upper portion of this group 

 is remarkable by containing a very white concretionary limestone, 

 made up of small tubular and concentric layers, several varieties of 

 which, occurring in other parts of this tertiary series, very much re- 

 semble concretions in the magnesian limestone of England. 



g. Calcareous sands and pebble beds, calcareous grits and oolitic 

 imestone. These form the superior and youngest stratified deposits 

 of the country. At Radkersburg, where the section terminates and 

 the hills sink into the plains of Hungary, the sands, marls, and grits 

 are charged with shells, some of which are identical with existing* 

 species, the whole group being similar to those of the highest mem- 

 bers of the basin of Vienna. Other beds pass into concretionary masses 

 of an oolitic limestone, similar to that which is described in the next 

 section. 



The second section from Radkersburg on the south to Riegersberg 

 on the north, exhibits the structure of the youngest zone of the 

 tertiary deposits of Styria, and its relations to certain volcanic rocks. 



Several lofty and serrated ridges of volcanic rocks range from Hain- 



* Mactra carinata and Cerithium vulgatum. 



