158 BUREAU OF AMERICAN ETHNOLOGY [bull. 60 



The principal aboriginal quarries or mines, so far as explored, 

 may be classed as follows : 



(a) Quarries of massive stone for sculpture and building. 



(b) Quarries of massive deposits of brittle stone. 



(c) Quarries of nodules of brittle stone. 



(d) Quarries of bowlders of brittle stone. 



(e) Quarries of steatite or soapstone. 



(f ) Quarries or mines of mica. 



(g) Quarries of catlinite or red pipestone. 

 (h) Quarries or mines of turquoise. 



(i) Quarries or mines of hematite (iron ore), 

 (j) Quarries or mines of copper, silver, and gold. 

 (k) Quarries or mines of clay and fire clay. 

 (1) Quarries or mines of pigment materials, 

 (m) Quarries or mines of salt, 

 (n) Mines of emeralds. 



