56 



G. R. Mansfield — Triassic and 



City formation, which was correlated with the "upper 

 Coal Measures limestone" of the Fortieth Parallel 



•SIR 

 It: 



i° 



8 8 



8 



8 R 



Survey. To the red beds above the Thaynes, Boutwell 

 gave the name Ankareh shale. 6 In later work 7 he cor- 



6 Boutwell, J. M. : Stratigraphy and structure of the Park City mining 

 district, Utah, Jour. Geol., vol. 15, No. 5, pp. 434-458, 1907. 



7 Idem: Geology and ore deposits of the Park City district, Utah: U. S. 

 Geol. Survey, Prof. Paper No. 77, pp. 42-59, 1912. 



