348 



STRUCTURAL GEOLOGY OF NORTH AMERICA 



KAIPAROWITS FORMATION- Kk 



STRAIGHT CUFFS AND WAHWEAP SANDSTONES Ksw 



" DlKOTflW - 3ANOSTo>JE "™ AND TROPTc - FORMATION — ~ K Jt " 



CARMCL FORMATION— j e 



C N T H * <M — & O f>wa T I O N- — + 



p- 



NAVftJO SANDSTONE — Jo 



I. CLOSE OF KAIPAROWITS TIME . BEFORE FOLDINS 



BEDOED PYROCLASTICS AND FLOWS- 

 WELDED TUFFS— Eorly TtTfiory 



2. EARLY OR MID- TERTIARY, AFTER BEVELING OF LANAMIOE FOLDS AND 

 DEPOSITION OF CLARON FM. ANO VOLCANICS 



3. MID- TERTIARY!?), INTRUSION, FOLOIN0, DEVELOPMENT OF HURRICANE FAULT 





ptNE VALLEY 



INTRUSION 



1— 





Jn 



•vTrrs^, Ti. 



Ob, 



He, 



~^tt 





J" 



\ 



^ 1 









.1 ""^"^V 



4. PRESENT. DISPLACEMENT AND TILTING ALONS MINOR FAULTS OF THE 

 HURRICANE FAULT ZONE NOT SHOWN 



Fig. 22.22. Evolution of Pine Valley Mountains and Hurricane fault across Ash Creek Valley. 

 Reproduced from Cook, 1957. Csc, Coconino ss.; Pk, Kaibab Is.; "6m, Moenkopi fm.; "Rs, 

 Shinarump congl.; 1c, Cfiinle sh.; Jn, Navajo ss.; Jc, Carmel fm.; Je, Entrada ss.; Kdt, Dakota ss. 

 and Tropic sh.; Ksw, Strait Cliffs and Wahweap ss.; Kaiparowits fm.; Tc, Claron fm.; Qb, 

 Quaternary basalt. 



Muddy Mountain and other large thrusts in the region which are not known to 

 involve formations younger than Jurassic. Therefore the earlier orogeny can 

 now be dated merely as post-Jurassic and pre-Upper Cretaceous. 



Overturned and faulted folds associated with the Glendale thrust rival in 

 complexity some structural features of the Swiss Alps. Important transverse 

 faults with large strike-slip component pose problems of origin; the largest of 

 these displaces the Muddy Mountain thrust plate as much as 2 miles vertically 

 and may be genetically related to the Glendale thrust. Numerous normal faults, 

 variously oriented, bear witness to movements ranging in date from the Glen- 

 dale thrusting episode to late Cenozoic time (Longwell, 1949). 



For another more recent summary treatment of southern Nevada see 

 Longwell (1952a, b). 



MOSTLY HIGH 

 ANGLE FAULTS 



Fig. 22.23. Faults in the northern part of the Gold Hill Mining District, Ut. After Nolan, 1935. 

 Section 23 of Fig. 22.1. 



