Bad Lands near Boise, N.P.R.R.

Thomas Moran's sketch captures the dramatic geology of Idaho's badlands along the Northern Pacific Railroad route. Working in pen and ink on tinted paper, Moran layered hatching and linear marks to render eroded buttes and plateaus rising above a river valley dotted with vegetation. Annotations in his hand identify geological features and color notes—yellows, reds, browns—guide the composition. Moran, an English-born landscape painter, spent decades documenting the American West's remote terrain, translating geological survey observations into intimate field studies that informed his monumental studio paintings. These working sketches reveal the artist's process: direct observation, rapid notation, and the translation of three-dimensional landscape into two-dimensional form through selective emphasis and graphic technique.