Geological Society. 51 



tricts are stated to differ little from those of the Hartz and the 

 South of Scotland ; and the caverns which abound in the blueish gray 

 limestone, subordinate to this formation, may, the author conceives, 

 have been produced by the acidulous waters which are still so 

 abundant in the country, as at Gefatter Loch, &c. This old lime- 

 stone formation abounds in Madrepores, Caryophyllia, Encrinites, 

 and Orthoceratites. 



The author is of opinion, that the sienite was erupted during the 

 period between the formation of the grauwacke, and the primary 

 chain of Bohemia. This sienite has very various characters, being 

 sometimes porphyritic, at other times associated with talcose and 

 quartzose rocks, &c. 



Above the sienite lies a coarse, red conglomerate, which is con- 

 nected in Bohemia with a great deposit of red sandstone with 

 coal. Here the author corrects an error in Schropp's Map, where 

 the district is coloured as new red sandstone j instead of which, he 

 considers it to be of the age of the Scotch red coal-grits. 



The other coal deposit of the basin of the Oder is in aluminous 

 and bituminous slate, with gray sandstone, and many vegetable im- 

 pressions, but without red sandstone. 



The Zechstein is wholly absent in these parts, and the true red 

 marl is very scarce. 



The Muschelkalk, however, occupies some space in Upper Silesia 

 and Poland, and contains most of its characteristic fossils. 



The Jurassic and Alpine limestones extend over a large portion 

 of the Map j and the dolomite, the upper beds of which abound 

 with Madrepores, Encrinites, Diceras, and Terebratulae, is overlaid 

 by the Carpathian or Vienna sandstone (Andrychow, &c.). 



The Carpathian sandstone fills a cavity between a range of true 

 Alpine limestone on one side, and Jura limestone on the other, and 

 is easily divisible into three parts. 



1 . The lowest division is marly and calcareous, containing Fu- 

 coides intricatus and F.Jurcatus, and has been mistaken on Schropp's 

 Map for transition limestone. It is cut through by dykes of ser- 

 pentine and greenstone. 



1 2. The middle group is more quartzose. 



3. The highest is characterized by reddish marls, several beds 

 of ruiniform, compact limestone, some Fucoides, Encrinites, Lepa- 

 dites, Tellinites, resembling those of Solenhofen ; Possidonia, Tere- 

 bratulae, Ammonites, and Belemnites. This triple system of the 

 Carpathians is overlaid by a group of sandstone which the author 

 considers to be the "green-sand;" this is composed of conglome- 

 rate, nummulite limestone, and green, calcareous beds with Gry- 

 phcea columba, Ostrea vesicularis, &c. f also with superior beds re- 

 sembling the Planer Kalk of the Germans. The greensand of Mo- 

 ravia has all the characters of that of North-western Europe, pass- 

 ing upwards into a superior, marly greensand, with fossils, and for- 

 ming long, continuous plateaux. For details the author here refers 

 to previous publications of his own, and to sections with which his 

 Map is accompanied. 



H 2 Chalk 



