MINERALS OF CHILE. 77 



being filled by a yellowish and greenish olivine, sometimes the 



olivine constituting one fifth the mass. We have no account 



of the falling of these meteoric masses. One specimen that 



was examined gave 



Iron 90.08 



Nickel «... 9.12 



Cobalt 39 



Copper 03 



Phosphorus 13 



99.75 

 The olivine accompanying was also analyzed : 



Pulverulent Olivine. Compact Olivine. 



Silica 40.50 39.51 



Peroxide of iron 11.54 13.38 



Magnesia 46.41 47.37 



Manganese 35 .16 



Lime trace. trace. 



98.80 100.42 



MAGNETIC OXIDE OP IRON. 



Found in veins of copper at Higuera and various other 



parts of the provinces of Coquimbo, Copiapo, and Chilian. Its 



constitution is 



Iron 72.40 



Oxygen 27.60 



Formulate P. = 



MICACEOUS OXIDE OP IRON. 



It is abundant in Higuera and Punitaque, where it accom- 

 panies minerals of copper, gold, and mercury. Its most con- 

 stant companion is gold. Small veins of carbonate or silicate 

 of copper are frequently contained between the scales, and 

 occasionally red oxide of copper. Its composition is 



Iron 70 



Oxygen 30 



The formula is £. 10 ° 



GOTHITE. 



Commonly found in scales or plates, disseminated or grouped, 

 and is sometimes mistaken for cinnabar. It is also found in 

 the form of geodes, particularly in Topocalma and Yaldivia ; 

 in the geodes marine shells (turritella) are frequently found 

 of very modern alluvial formation, like that in which the 



