PRIMARY LIMESTONE. 371 



THIRD DIVISION. 



Compound : of three ingredients, 



A. Limestone with noble serpentine and mica. 



B. With noble serpentine aud sahlite. 



C. With hornblende and angit. 



FOURTH DIVISION. 



Compound : consisting* of any of the preced- 

 ing varieties with fragments of previous lime- 

 stones or of other rocks. Conglomerates. 



A. With limestone fragments alone, united in 

 various ways. 



a. The fragments imbedded in a general 



continuous calcareous base. 



b. The fragments agglutinated with little 



or no proper base, and of various 

 sizes. 



B. Fragments of quartz imbedded in limestone. 



C. Fragments of argillaceous schist imbedded in 

 limestone. 



D. Fragments of various primary rocks, with or 

 without fragments of limestone also, imbedded in a 

 calcareous base. 



Most of the calcareous conglomerates which 

 are found in company with the simple primary 

 limestones, may be referred to one or other of 

 the first three varieties,, which are at least the 



BB2 



