864 A. Geikie—Archean Rocks of the Wahsatch Mts, 
extent influenced the observations of some of the able geologists 
whom.we owe our acquaintance with these western ranges. 
n a recent visit to the Wahsatch Mountains I was strongly 
inclined to doubt the correctness of the interpretation of the 
central and so-called Archean portion of the chain given in 
the Reports of the Geological Exploration of the 40th Parallel. 
And I am disposed to offer the results of my visit for the con- 
sideration of those who are much more familiar than myself 
once more been revealed by denudation. - 
Now the fact of the existence of a cliff more than 54 miles 
high would require to be established by very carefully collected 
and convincing evidence. It was with very considerable curl- 
osity therefore that I paid a visit to the Cottonwood district, 
where the evidence was said to be most complete. I must 
frankly own that I failed to observe any grounds on which the 
assertion appeared to me to be warranted. One would natu- 
rally expect that if a mass of strata 30,000 feet thick had been 
laid down against a steep slope of land, its component beds 
* Geol. Exploration of 40th Parallel, vol. i, p. 124. 
