USGS IMAP 2327: Geologic maps of the Olympus Mons region of Mars
By Planetary Geologic Mapping
1994 (approx.)

Detailed Description
USGS IMAP 2327: Geologic maps of the Olympus Mons region of Mars
By E. C. Morris and K. L. Tanaka
Map and associated documents available from the USGS Publications Warehouse: https://doi.org/10.3133/i2327
Sources/Usage
Public Domain.