Excelsior Geyser, Yellowstone Park

Thomas Moran's ink sketch captures the Excelsior Geyser during its most active period. The drawing emphasizes the geological formation's dramatic vertical thrust and surrounding thermal features through economical line work. Moran, a celebrated landscape painter of the American West, employed rapid sketching to document the geothermal phenomena he witnessed. This field study exemplifies the artist's method of recording topographical detail for later development into finished compositions. The dated notation reflects the practices of 19th-century survey artists who documented natural wonders with immediacy and precision.