Beyond 100th Meridian, Wallace Stegner

In this book Wallace Stegner recounts the successes and frustrations of John Wesley Powell, the distinguished ethnologist and geologist who explored the Colorado River, the Grand Canyon, and the homeland of Indian tribes of the American Southwest, A prophet without honor who had a profound understanding of the American West and warned long ago of the dangers economic exploration would pose to the West and spent a good deal of his life overcoming Washington politics in getting his message across. Only now, we may recognize just how accurate a prophet he was.

This book was very much like Powell's, Stagner goes on describing the mountains, cliffs and the environmental richness of the Southwest. A very marked difference is that Stagner's Beyond the 100th Meridian focuses more on the scientific data and analysis as well as environmental policies. Powell's Exploration of the Colorado was more descriptive of the landscapes and the Indian tribes.
Personally, I enjoyed Powell's approach better.