Scale not given (W 124°59ʹ00ʺ--W 112°41ʹ00ʺ/N 49°19ʹ00ʺ--N 43°57ʹ00ʺ).
Relief shown by shading and spot heights. Shows the effect of the prehistoric Missoula Flood events superimposed on a contemporary map of the Pacific Northwest. "The Art of Cartography." Signed in pencil by David Imus. Accompanied by text sheet, About this print. Originally published as part of: Essential geography of the United States of America.
The map shows northern Oregon, Washington State, and northern and western Idaho.