Thomas Moran, Green River, Wyoming (1883), oil, 13 x 20. Estimate: $1,000,000-$1,500,000. ← Previous Next → Thomas Moran, Green River, Wyoming (1883), oil, 13 x 20. Estimate: $1,000,000-$1,500,000. Thomas Moran, Green River, Wyoming (1883), oil, 13 x 20. Estimate: $1,000,000-$1,500,000.