Geology. 119 
stones, chiefly dolomitic (cargneules), with interstratified beds of gypsum, 
underlaid by red and green marls and a silicious sandstone or arkose, the 
whole series, which attains a thickness of 2500 feet, being destitute of 
fossils, and reposing upon (3) shales and sandstones which enclose beds o 
anthracite and plants of the carboniferous epoch. Succeeding these comes 
e conglomerate of Valorsine (4), which, with the preceding group, he 
refers to the carboniferous system, while beneath all these are (5) reddish 
crystalline schists and gneiss, passing into a rose-colored protogine or tal- 
granite, 
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 Cargneules as analogous to the tufas which we have elsewhere de- 
pt as often associated with true dolomites. (This Journal, xxviii, 
2.) To this subject we propose soon to return, but we take occasion 
i of soluble magnesian salts either by solutions of bicarbonate of 
Soda or bicarbonate of lime, in the latter case sulphate of magnesia being 
rere and sulphate of lime being also a product. (Comptes Rendus 
Acad., xlviii, 1003, and this Journal, xxviii, 170.) 
Mr. Favre not endeavored to identify the Permian system in this 
428 although according to Pidancet it occurs with its characteristic 
flora, beneath the vari 
