2 GEOLOGICAL MEMOIRS. 



nearer to those from the Carboniferous beds of Waldenburg (Saxony) 

 and of Eadnitz (Bohemia) than to those hitherto known to occur in 

 the Old Eed Sandstone. — B. Arkose-sandstones and a series of thinly 

 stratified ribboned sandstones, with micaceous shales and beds of 

 marly limestone. This subdivision, the most extended, and over- 

 lying unconformably the strata of subdivision A, is but poor in 

 organic remains, with the exception of silicified stems ofArauca- 

 rites in the arkose-sandstones. A stem of Araucarites Schrollianus, 

 Goepp., 24 feet in length and 3^ feet in diameter, has been obtained 

 for the Museum of the Imperial Geological Institute of Vienna. A 

 remarkable occurrence in these strata, stated by Prof. Goeppert of 

 Breslau, is that of Araucarites cupreus, a species also known from 

 the Permian strata of Eussia. — C. Brownish and brick-red arenaceous 

 shales, with subordinate layers of sandstone, marls, and bituminous 

 slates (holding from 25 to 45 per cent, of bitumen), with associated 

 iron-^ores, spheerosiderites, and insignificant veinlets and lenticular 

 aggregations of anthracitic black coal. These slates, constantly 

 lying unconformably over the sandstones of subdivision B, are only 

 met with in isolated patches, partly intercalated with the lower sub- 

 divisions. Vegetable-remains are very scarce in them ; their chief 

 characteristics are abundance of fossil Fishes and the occurrence of 

 copper-ores, malachite, the blue and green carbonates of copper, 

 sulphurates, sihcate and blacli oxide of copper, and allophane, with 

 j to 30 per cent, of copper, and -^ to -^-^ per cent, of silver. These 

 ores are irregularly spread through the whole of the Old Eed Sand- 

 stone ; so that mining enterprises here have been generally attended 

 with a very slight success. Probably the copper and the substances 

 united to it in its ores have been infiltrated into the rock by mineral 

 waters, connected with numerous operations of melaphyre. Pive 

 protrusions of this igneous rock may be traced within the Old Eed 

 Sandstone territory in question, three belonging to subdivision C, 

 and two to A and B. The older melaphyres are characterized by 

 the presence of amygdaloids, jasper, &c., and in some localities are 

 cut through by melaphyric protrusions of more recent date. Por- 

 phyries between the subdivisions B and C, and efiusions and pro- 

 trusions of basalt are but of local and rather scarce occurrence. 



[COITNT M.] 



On the Old Eed Sandstone of Centeal Bohemia. 

 By M. LiPOLD. 



[Proceed. Imp. Geol. Instit. Vienna, March \% 1861.] 

 In the circle of Prague (Central Bohemia) the Old Eed Sandstone 

 fills up the small bay of Bohmisch-Brod, about half an Austrian 

 mile in breadth, between groups of granitic and gneissic rocks, and 

 seems to represent (as far as its very narrow extent allows us to 

 judge) the subdivisions B and C of the Sudetian Old Eed Sandstone 

 (see above). Melaphyres and eruptive rocks in general are want- 

 ing. Copper-ores, in the lower arkose-sandstones and marly slates 

 (bituminous slates with seams of black coal and remains of Pishes 



