TRANSLATIONS AND NOTICES 



OF 



GEOLOGICAL MEMOIRS. 



On the Geology of a part of Northern Bohemia. 

 By Herr Jokely. 



[Proceed. Imp. Geol. Instit. Vienna, August 1857.] 



The environs of Leitmeritz, Aussig, Teplitz, and Klostergnab 

 (North Bohemia), having been geologically surveyed by M. Jokely, 

 he finds that the subdivisions of the Planer (cretaceous) limestone 

 prevail round Leitmeritz and Aussig ; the middle Planer-marl usually 

 overlying the lower ; the latter resting on Planer-sandstone, which 

 is based on mica-schist and gneiss. 



The middle Planer-marl is generally overlaid by tertiary sand- 

 stones ; and these by lignitiferous shales. Basalt occurs here in the 

 form of tuffs and sandstones, both resting on these shales. The lig- 

 nite-deposits, worked in a great number of mines, are a continuation 

 of the tertiary carbonaceous deposits of Paatz, corresponding to their 

 upper series. Extensive diluvial deposits occur along the Elbe, near 

 Theresienstadt and Leitmeritz. 



The prevailing rock of the Erzgebirge (as far as included in M. 

 Jokely' s survey) is grey gneiss, cut off near Graupen by an extensive 

 "mass" of euritic porphyry (felsit-porphyr), extending hi insular pro- 

 minences within cretaceous and lignitiferous strata as far as Teplitz 

 and Schonau, where thermal springs issue from it. The metalliferous 

 veins intersecting the gneiss in the vicinity of the euritic porphyry 

 are generally most productive along the line of contact of these rocks. 

 Several of the silver-" and lead-bearing veins are still untouched ; so 

 that it might be possible to revive the mining enterprises which in 

 ancient times gave fame and riches to this district. 



[Count M.] 



On the Geology of the Neighbourhood of Innspruck. 

 By Fr. Bitter von Hauer. 



[Proceed. Imp. Geol. Instit. Vienna, August 1857.] 



Having finished the survey of the environs of Innspruck*, assisted 

 by Prof. Pichler and Herr Prinzinger, M. von Hauer reports that the 

 Cardita-bed, interposed as a distinct boundary between the light- 

 coloured upper triassic limestone and dolomite, continues as far as 

 Scharnitz, between the Eiwaldberg and the Arnstritz, to Gars, in the 



* See Quart. Journ. Geol. Soc. vol. xiii. part 2, Miscell. p. 39. 



VOL. XIV. PART II. C 



