192 



N. H. DARTON 



Originally the area was a plain sloping gently to the Carrizo Creek 

 and on this plain a sheet of lava was ejected, possibly from a vent 

 marked later by the cinder cones in the depression. Following the 



„- > • ^JV '' -> -■ 'sit Wv, 



'J „ „ 



Fig. 5. — Looking into the crater in the larger cinder cone; showing pool of salt 

 water which is at lake level. 



lava flow there was a great ejection of hot water from a centraWent, 

 which dissolved a thick mass of salt, and brought to the surface and 

 spread in all directions a large amount of fine scoria and rock frag- 



