494 INDEX TO THE STRATIGRAPHY OF NORTH AMERICA. 



is to be compared with the Stocldieim and Cusel beds in Germany and the series in the basin of 

 Brives, in France. None of the characteristic coniferous genera Ullmannia, Tylodendron, 

 Walchia occurs in Dunkard beds, though all are in Prince Edward Island and Walchia is reported 

 from Texas; and similarly many genera of ferns characterizing the Rothliegende of Europe 

 seem to be wholly unrepresented. 



In connection with Mr. White's conclusions, it is well to recall some relations noted in 

 preceding pages. The general physical conditions during Allegheny and Conemaugh were 

 practically the same, for while the basin was contracting there was no material variation in 

 character of the movements, but with the beginning of the Monongahela the area of greatest 

 subsidence was sliifted a hundred miles and a new condition remained unaltered throughout 

 the Monongahela and Washington, which in this respect are one as the Allegheny and Cone- 

 maugh are one. A notable change occurred at the Washington, and Mr. Wliite has shown that 

 the strongly marked lower Rothliegende flora makes its appearance near the bottom of the 

 Greene formation. 



K 10. KLAMATH MOUNTAINS, CALIFOBNIA. 



Certain limestones of the Klamath Mountain region are faunally more closely 

 related to the Guadalupe group of the Permian of trans-Pecos Texas than to any 

 other terrane in the United States." (See pp. 359-360, Chapter VIII.) 



K 12-13. WYOMING, NORTHERN COLORADO, AND UTAH. 



In the Park City mining district, northeastern Utah, Boutwell distinguished 

 the Woodside shale, Thaynes formation, and Ankareh shale. (See section given on 

 p. 380, Chapter VIII.) The Woodside is a fine-grained unfossiliferous red shale 700 

 to 1,180 feet thick, which conformably overlies the Park City formation (Pennsyl- 

 vanian). The Thaynes is characteristically calcareous and rich in fossils. It is 

 1,190 feet thick. In 1907 Girty reported that "the fauna and horizon are those 

 which in the Fortieth Parallel Survey reports are called Permo-Carbonif erous " and 

 said: "It seems probable that the fauna will be correlated with the Permian of the 

 Grand Canyon section." Revising this statement in 1910, he states: "Latest infor- 

 mation makes it doubtful whether these are not Triassic, in part almost certainly 

 equivalent to the Triassic of Idaho." 



The Ankareh shale is a siliceous red shale and sandstone, 1,300 feet thick, which 

 on rather meager paleontologic evidence is classed as Permian.^^^ 



The Woodside and Thaynes formations of northeastern Utah were recognized 

 by Veatch*^^ in southwestern Wyoming, where they have a development similar 

 to that at Park City. Above the Thaynes limestone and below the fossiliferous 

 marine Jurassic, Veatch distinguished the Nugget formation, which he classed as 

 Triassic (?) . His Nugget comprised two members^ a bright-red sandy shale, reaching 

 a maximum thickness of 600 feet (now correlated by Gale with the Ankareh shale) , 

 and an upper sequence of light-colored sandstones (to which the name Nugget is 

 now restricted) . 



The divisions of the red beds recognized by Veatch were in 1906 traced north- 

 ward by Schultz'' into central Uinta County, Wyo. 



The region examined by Boutwell, Veatch, and Schultz is the western part of 

 the province in which the red beds of Permian and Triassic age are developed. 



"Girty, G. H., personal communication. 6 Schultz, A. R., personal communication. 



