HINTZJJ, GEOLOGY OF WASATCH M0UNTAJN8, UTAH 1()9 



Tenny, for Devonian strata have generally been held to be absent in this 

 part of the range. Boiitwell/^ in his report on the Park City district, 

 says that Devonian fossils have only been found in the northern part of 

 the Wasatch range, and the formation in which they occur has been with- 

 drawn from the Wasatch limestone and correlated witli the Jefferson 

 limestone. 



Section in South Fork 



(Upper continuation of the section given under the Ordovician) 



Pennsylvanian (Weber quartzite) : p^^^ 



30. Hard brownish sandstone 500 



29. Limestone conglomerate .3 to 10 



Unconformity. 



Mississippian (Reade formation) : 



28. Cherty light yellow argillaceous limestone with large Zaphren- 



toid corals 5 



27. Thin-bedded fossiliferous blue limestone 350 



26. Brown and red shales .35 



25. Cream colored sandstone 250 



24. Massive blue limestone with productus 300 



Devonian (Benson limestone) : 



23. Hard dark blue cherty coralline limestone 100 



22. Massive dark blue limestone 300 



21. Fossiliferous blue limestone 3 



20, Thick-bedded blue limestone 100 



19. Dark blue cherty and brecciated limestone 200 



18. Hard blue limestone 100 



17. Dark porous limestone, very fossiliferous 21 



16. Thick-bedded blue limestone, extensively bored 1 20 



15. Thick-bedded light blue limestone 43 



14. Thin-bedded blue limestone 45 



Total 2,475 



Disconformity. 



Subformation : Maxfield formation. 



Kindle^" has described the Jefferson limestone fauna and traced the 

 beds from their type locality in Montana southward into the Wasatch 

 Mountains of northern Utah. The following section is given from Green 

 Canyon :^^ 



i» J. M. BOUTWELL : IT. S. Geol. Surv. Prof. Paper 77. 



20 E. M. Kindle : "The Fauna and Stratigraphy of the .Tefferson Limestone in the 

 Northern Rocl<y Mountains," Bull. Am. Pal., Vol. 4, No. 20. 

 ^Ihid., p. 16. 



