Arkansas Valley, CO
William Henry Jackson, 1873. Moraines on Clear Creek, Valley of the Arkansas, Colo. (United States Geological Survey.)
William Henry Jackson, 1875. Great Morainal Valley of the Arkansas on the mouth of La Plata. (United States Geological Survey.)
William Henry Jackson, 1873. View down the Arkansas from near the mouth of Lake Creek, Colo. (United States Geological Survey.)
William Henry Jackson, 1875. Mt. Harvard and the Valley of the Arkansas. (United States Geological Survey.)