John Charles Frémont,
The Exploring Expedition to the Rocky Mountains…
“ The formation of the country is a red feldspathic granite, overlaying a decomposing mass of the same rock, forming the soil of all this region, which everywhere is red and gravelly, and appears to be of a great floral fertility.As we emerged on a small tributary of the Laramie river, coming in sight of its principal stream, the flora became perfectly magnificent; and we congratulated ourselves, as we rode along our pleasant road; that we had substituted this for the uninteresting country between Laramie hills and the Sweet Water valley. ”
