244 H. M. Bannister—Age of the Laramie Group. 
B. Meek, in the year 1872, we both thought we found evidences 
of conformability between these strata and the overlying Ter- 
Mr. Emmons, Mr. King’s assistant, when speaking of this same 
40th Parallel): “To the west of Rawling’s Peak, as we have 
seen, the Cretaceous strata fall off with an ever decreasing angle 
of dip, assuming to the north of the railroad, between Separation 
and Washakie, an almost horizontal position, and are gradually 
succeeded by the overlying, and, in this region, conformable 
beds of the Vermilion Creek Tertiary.” This passage Sut 
ciently indicates that the conformability of the strata is not 
merely local; and that it is also not local at Black Buttes, 6 
proven by the testimony of Professor Cope, who found it to 
exist for miles south of the station, while our observations were 
made to the north. Thus we have a conformability, as far as 
observed, on both sides of the Washakie Tertiary basin, accord- 
ing to the testimony of Mr. King’s own survey. 
Passing to the westward, we find Mr. King speaking as fol- 
lows in regard to the Evanston coal-bearing strata which, DY 
Mr. Meek and myself, had been regarded as of uncertain but 
probably of Tertiary age. ‘ At Evanston the highest portions 
