X3C M. Bbongniaut's Table 



Granitic Ps Distinct grains of quartz and felspar in nearly- 

 equal quantities, connected almost without 

 cement. 

 (Chateix, near Royat. Mont Peyroux in 

 Auvergne.) 



Micaceous Ps Grey sandy paste, containing numerous plates 



of mica. 

 (The greater part of the coal grits. ) 



Reddish Ps A reddish sandy paste mixed with mica. 



(Micaceous red sandstone.) 



(The heights of the environs of Saarbruck, 



&c. — Athis, near Feugeurolle, in the en- 



^ virons of Caen. Rothe-todt-liegende of 



Yaterstein, near Henstadt, in the Hartz. — 



Kaufinger-Wald, near Cassel.) 



Schistose Ps A blackish ar^riHo-sandy paste, containing 



mica. 

 (The greater part of schistose greywackes.) 



CALCAREors Ps A tolerably conpact sandy calcareous paste 



with mica. 

 (Bonneville, near Geneva. — Lautenberg in 

 the Hartz.— Hauszelle, near Zellerfeld, in 

 the Hartz.) 



Genus 2. THE IMBEDDED ROCKS. 

 Fragments enveloped in a very distinct paste. 



Species 1. MIMOPHYRE. (Some greywackes.) 



An argillaceous cement uniting very distinct grains of fel- 

 spar, and sometimes of quartz, clayslate, &c. 



Principal varieties. 



QuARTZOSE M Hard and solid, with numerous grains of 



quartz. 

 (Chateix, near Royat in Auvergne, — Summit 

 of the Pormenaz, in the Savoy Alps, — near 

 the Vallorsine conglomerates.) 



Argillaceous M Friable with some grains of quartz and mica, 



with fragments of carburated schist, &c. 

 (Flohe, between Freyberg and Chemnitz ; the 

 argillaceous paste is green with small rose- 

 coloured crystals of felspar. The red thon- 

 stein with white spots of Zaukerode, near 

 Tharand.) 



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