Ill': MOUNT JURA FAULT. 



385 



Furthermore, as shown in the foregoing section (figure 5) which 

 crosses mount -I urn approximately perpendicular to the strike, the J lard- 



Hinchman ravine 



FiauEE 6. — Eastern Slop< of Mount Jura. 

 I Hinchman tuil : 5 — Bicknell sandstom G Mormon sandstone; 7 Thompson limestone; 

 8 = Illinium vi' sandstone; E= Eruptive rocks. 



grave sandstone, Thompson limestone and Mormon sandstone are re- 

 peated in exactly the same order on opposite slopes, as represented in 

 figure •'). Such a repetition ofthe strata can be produced only by faulting. 



s.w. 



ftformon Canon of 

 Indian Creek 



Mt. Jura 



Hi nchman 

 rav I no 



Pioi kjb 6.— Section through Mount Jura. 



4 = Hinchman tuff ; 5 = Bicknell sandstone; 6= = Mormon sandstone; 7 Thompson lime 

 8 Hardgrave sandstone ; 9 Foreman beds; LI = Hosselkus limestone ; E = Eruptive rocks. 



We should expect the fault or its attendant phenomena to hi' displayed 

 on the western 'slope of mount Jura, where the repetition begins, and in 

 fact we find at that point a number of exposure- deserving special men- 

 tion. 



s.w. 



,*-"-5C- 



Fioubk 7. -<S I'l'-' a ' ■ nerwirtlCs 



• Mormon sandstone; 7 Th pson limesl ; 8 Hardgrave sandstone; E Eruptive 



rocks. 



On the second prominent spur, which reaches the stage road south of 

 the Indian village at an elevation of 5,100 feet, an outcrop nearly LOO 

 fei'i in length is exposed. It is illustrated in figure 7. 



LI l-l'.ri i flKOi Soi . \\i.. Vol . ::. 1801. 



