-I 



Fig. 547. — Map showing the area of Lake Lahontan and the residual lakes of the present 

 time. The black lines with hachures represent the lines of post-Pleistocene faulting. 

 Most of them were also lines of pre-Quaternary faulting-, and some of the latter, 

 indicated by black lines, do not represent sites of post-Pleistocene displacement. 

 The black dots represent springs, many of which are hot. Their proximity to faults 

 is in some cases striking. 



466 



