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A critical Examination of the first Principles of Geology in a Series of Essays / By G. B. Greenough
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White and black QuartzMica-slate with Garnets .

On the South of the Great St. Bernard.

Primitive Clay-slate with veins ofGypsumMica-slateGneissQuartz

Primitive LimestoneGneiss

Primitive LimestoneHornstoneMica-slatePotstone

Actinolite, with or without-.

Garnets I

Primitive Limestone [ ^

Gneiss J

Mica-slate

Primitive Limestone

Primitive Greenstone and Serpentine.

In Ebels work, from which these sec-tions have been taken, will be found several