Sulphur Mountain

Thomas Moran's field sketch depicts a Canadian mountain landscape with geological precision. The drawing uses rapid pen strokes to indicate columnar rock formations and surface texture, capturing the sulfurous mineral deposits that define the peak. Annotations label key features—"Great," "White," "Geese"—marking Moran's observational method during his travels through western North America. As a landscape painter known for monumental Rocky Mountain scenes, Moran combined artistic sensitivity with scientific documentation, a practice common among nineteenth-century artists exploring continental geology and topography.