PERMIAN GBOUP. 85 



PALEOZOIC SERIES. 



PERMIAN GROUP. DEVONIAN GROUP. 



CARBONIFEROUS GROUP. SILURIAN GROUP. 



PERMIAN OR 3iL\GNESIAN LIMESTONE GROUP. 

 Tekrain Peneen. Fr. 



EnglUh Authors. German Authors. French Authon. 



Magnesian Limestone . . ZedLstein .... Calcaire Magn^ian. 



Dolomitic Conglomerate. Kupfer-scMefer . . ScMste Cnivreux. 

 Lower Red Sandstone ."1 



Pontefract Rock. . . | Rohte-todte-Hegende. Gr& des Vosges. 



The upper beds of this group consist, in the south of 

 England (near Bristol), of calcareous conglomerate or 

 breccia, in which rounded or angular pebbles of the older 

 rocks are cemented by a red or yellow base of Magnesian 

 Limestone or Dolomite ; the pebbles being formed chiefly 

 of the materials composing the subjacent rocks. In the 

 north of England the limestone varies considerably, and 

 contains more or less magnesia ; the colours are white, 

 grey, red, but generally yellow — sometimes fine-grained 

 and thin-bedded, (Knottingley) — granular and flaglike, 

 (Nottingham) — compact or somewhat crystalline and con- 

 cretionary, with numerous fossils, (Sunderland.) With 

 these are associated, variegated marls, marl slate, red marl 

 and gypsum, and thin-bedded grey limestone. (Sedgwick, 

 Geol. Trans, vol. iii.) 



