48 A . 0. Peale — Application of the Term Laramie. 



and Tertiary. There is no difference between us as to the 

 conformity of the Laramie Group with the underlying Fox 

 Hill. It is simply a question of determination of age upon 

 which we differ." 



The italics in this quotation are my own. King is in error 

 as to the inclusion in the Laramie by Hayden of -the Fort 

 Union or of all the lignitic beds. Hay den's last word on the 

 subject is the following :* 



u If objection is made to the use of the term ' Lignitic ' 

 Group I would say that, in this work, it is restricted to a series 

 of coal-bearing strata lying above the Fox Hills Group, or 

 Upper Cretaceous, and these are embraced in the divisions 

 Laramie and Fort Union Groups. It is well known that there 

 are in various parts of the West, especially along the fortieth 

 parallel and southwestward, very thick beds of coal in the 

 various divisions of the Cretaceous, extending down even into 

 the Upper Jurassic. Had this not been the case, the more 

 general term Lignitic would have been retained by this Survey 

 in preference to any other." " It is also probable that the 

 Wahsatch Group as now defined and the Fort Union Group 

 are identical as a whole, or in part at least." 



Historically we find the first mention of the term Laramie 

 in an author's proof of a Geological map !No. II of the 40th 

 Parallel Survey by Clarence King and S. F. Emmons. This 

 map was dated November 15, 1875, and noticed in this Journal, 

 3d series, vol. xi, No. 62, p. 161, Feb. 1876. But neither on 

 the map, which covers the Green River Basin, nor in the 

 notice, is there any definition of the term. On the map cer- 

 tain areas are colored to represent the formation beginning 

 with the region to the west of Oyster Ridge, including the 

 vicinity of Rock Springs, Point of Rocks, and Black Buttes, 

 and extending on the east to Creston and a narrow strip of 

 country reaching southward from that station of the Union 

 Pacific Railroad. On the southern part of the map are sev- 

 eral small areas adjacent to the Uinta Mountains that are also 

 referred to the Laramie. It is noticeable that Carbon is not 

 included within the limits of the map. This map is referred 

 to by Hayden in his " .Notes on some Artesian Borings along 

 the line of the Union Pacific Railroad in Wyoming Territory,"f 

 in which article for the first time he uses the term Laramie, 

 which he does in strict conformity with the coloring of King's 

 map, which he evidently had before him as he wrote. 



In this article also Hayden repeats his division of the Ter- 

 tiary into four series as laid down in his report for 1870 (p. 74), 

 the first two being the following : 



* Report U. S. Geol. Survey of the Territories, Tertiary Flora, 1878, 'p. iv, 

 also p. v. 



\ Bulletin U. S. Geol. and Geograph. Survey of the Territories, vol. iii, 

 No. 1, pp. 181-185, April 5, 1877. 



