(W 111⁰00ʹ--W 110⁰15ʹ/N 46⁰15ʹ--N 45⁰45ʹ)., (W 111⁰30ʹ--W 110⁰45ʹ/N 45⁰30ʹ--N 44⁰30ʹ).
Relief shown by contours and spot heights.
Title taken from text.
Distributed to depository libraries in microfiche.
Maps include text, bibliography, and 2 index maps.
Components: Geologic maps of the northern part of Gallatin National Forest: Bridger Range and Crazy Mountains -- Geologic map of the western part of Gallatin National Forest: Gallatin and Madison ranges and west Yellowstone area.