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INSET: USGS IMAP 1802-A: Geologic map of the western equatorial region of Mars

By Planetary Geologic Mapping 1986 (approx.)

Small portion of USGS IMAP 1802-A: Geologic map of the western equatorial region of Mars

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Inset of USGS IMAP 1802-A: Geologic map of the western equatorial region of Mars

By D. H. Scott and K. L. Tanaka (1986)

Map and associated documents are available from the USGS Publications Warehouse: https://doi.org/10.3133/i1802A

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Public Domain.

Maps
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January 1, 1986

Geologic map of the western equatorial region of Mars Geologic map of the western equatorial region of Mars

The regional topographic swell centered in the Tharsis Montes and Syria Planum extends over one-third of the map area (U.S. Geological Survey, 1976). Within this high region are the four largest and youngest volcanoes on Mars: Olympus Mons, Arsia Mons, Pavonis Mons, and Ascraeus Mons. The latter three collectively form the large northeast-trending, volcanic mountain chain of the Tharsis...

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January 1, 1987

Geologic map of the eastern equatorial region of Mars Geologic map of the eastern equatorial region of Mars

The Mariner 9 mission in the early 1970’s provided the first comprehensive view of the geology of Mars (McCauley and others, 1972, Masursky, 1973) and led to the derivation of the first global geologic map (Carr and others, 1973). These preliminary studies were followed by more comprehensive mapping coordinated with the U.S. Geological Survey. Thirty quadrangles at a scale of 1:5,000,000...

January 1, 1987

Geologic map of the polar regions of Mars Geologic map of the polar regions of Mars

These geologic maps of the north and south polar regions of Mars, extending to 55˚ north and south latitudes, overlap by 2˚ the geologic maps of the western and eastern regions, which extend to lat ±57˚. The maps were compiled from Viking medium-resolution photomosaics at scales of 1:2,000,000 and from higher resolution Viking images. The quality and resolution of the Viking pictures are...

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