HUNTINGTON AND GOLDTHWAIT: THE HURRICANE FAULT. 203 
representatives of definite geological periods. For instance, the time- 
names “ Permian,” “ Trias,” and “Jura,” which suggest that the geologi- 
eal ages of the formations are well known, are applied by Dutton to 
formations whose exact ages are still in dispute. Since, therefore, we do 
not feel ready to accept Dutton’s names for the doubtful members of the 
Hard Red Sandstone 77 
LAL 
often Cross bodded. KK 
PAINTED - 
DESERT 4c0 redder Stalks ot base) = 
Chocolate Sandstones 
S ’ 
(thin, carbonaceays 
layer at bate 
Soft Red Shales 
(come Aerder Gray layora} 
Red Shales 
Foscilifersvs layor af bese) 
‘ Gray Limestone (feosiliferous) 
FIGURE 2. 
Diagrammatic cross-section of the rock series, as exposed along Le Verkin canyon, between 
Toquerville and Colob. 
rock series, we shall follow the present method of the United States 
Geological Survey, by using only local names, that have no time signifi- 
cance. In an earlier paper on the Toquerville district (p. 48) we used 
