460 



GEOLOGY. 



MAP OF 



LAKE BONNEVILLE 



showing 

 (inblac*.) 



THE DISTRIBUTION 



OF 



BASALT 



Fig. 540. — Map of Lake Bonneville, showing also the areas of basalt (black areas), 

 some of which are Quaternary, the lines of recent faulting (full black lines), and 

 the deformation of the basin (dotted lines). The figures on the dotted lines show 

 the height of the Bonneville shore line above the level of the present Great Salt 

 Lake. (Gilbert, U. S. Geol. Surv.) 



