days of the Lincoln Highway and U.S. 30, and a monument to Henry B. Joy, the first president of the Lincoln Highway Association, was placed just south of this point along the old highway. (It was relocated to Sherman Summit in 2001 to protect it from increasing vandalism.) Further west, I-80 crosses to the Colorado River drainage at about . This is now recognized as the true location of the Continental Divide, although the corresponding highway sign is located about 2.6 miles away at . (The placement of the Divide on the west rim of the basin signifies that this otherwise endorheic region would drain to the east if it were to overflow.) Having finally left the Great Divide Basin behind, I-80 continues west and at , around west of Evanston, enters the vastly larger Great Basin, staying within it until the crest of the Sierra Nevada at Donner Summit. Geology The Great Divide Basin is part of the Greater Green River Basin, separated from the Green River Basin by the Rock Springs Uplift during Late Cretaceous into the Early Eocene. Geography While usually thought of as a single basin, the Great Divide Basin is actually several contiguous sub-basins, most notably those centered on Circle Bar Lake, Frewen Lake, Lost Creek Lake, Red Lake, and Separation Lake. The interior ridges separating these sub-basins have led to disagreement about the correct path of the Continental Divide across or around the basin. The Lucite Hills form part of the western boundary of the basin, featuring Black Rock Butte and Emmons Cone. Alkali Flat and Greasewood Flat are directly to their northeast. Sand dunes lie in the central western part of the basin. In the southern part of the western basin, Red Desert Flat and Red Desert Basin are the major features. These are about northwest of the town of Wamsutter. In the northeast part of the Great Divide Basin is Chain Lakes Flat, southwest and downslope from Bairoil and Lamont. The basin is a high desert dominated by sand dunes, bluffs and alkali flats. Flora and fauna include small trees in some ravines and the occasional shrub, along with many birds and pronghorn, mule deer, feral horses, and a desert elk herd. The basin includes uranium ore deposits and many oil and natural gas wells. There has been debate between those who wish to exploit the resources within the basin and those