6*8 
GEOLOGY-COAL FROM CHILE AND AUSTRALIA. 
extent of tlie area over which the tertiary deposits are spread along the North and South 
American Pacific coasts. 
The coal of Australia has been fully described by Professor Dana in the geology of the ex¬ 
ploring expedition, and is only interesting in this connexion on account of the amount annually 
sold in the San Francisco market, and for comparison with those which have been already 
described. This coal has more of the laminated structure, the rhombohedral fracture and 
general appearance of the older coals, hut, from its softness and the evidently large quantity of 
sulphuret of iron which it contains, it cannot claim the first rank as a fossil fuel. 
