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PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 



[Apr. 10, 



colour, crystalline, compact, or cherty, with fossils that are of Car- 

 boniferous age. In the sections these limestones are lettered b. 



Along with them are softer beds of gritty sandy shale, generally of 

 a dull-red or purple colour ; and the irregular disintegration of these 



