NGA:Thomas Moran: west 4

LEFT: Thomas Moran, Tower Falls, 1872, Gilcrease Museum, Tulsa, Oklahoma, Blackmore Set, no. 8
RIGHT: Thomas Moran, The Grand Cañon of the Yellowstone, 1872, Gilcrease Museum, Tulsa, Oklahoma, Blackmore Set, no. 10

Working with William Henry Jackson, the expedition photographer, Moran completed numerous watercolor sketches of Yellowstone's hot springs, mudpots, geysers, and waterfalls. From his loosely sketched and broadly painted field studies, Moran composed highly structured, exquisitely painted watercolors in his studio.