Geologic map of Mars

This global detailed geologic map of Mars, is based on unprecedented variety, quality, and quantity of remotely sensed data acquired the last 16 years since the Viking Orbiters.   Images © USGS

The Martian map by USGS records the distribution of geologic units and landforms on the planet’s surface through time,

You can go explore the map here. All the colored parts represent areas of crust that were formed at different period of time and from different processes.

These data have provided morphologic, topographic, spectral, thermophysical, radar sounding, and other observations for integration, analysis, and interpretation in support of geologic mapping. In particular, the precise topographic mapping now available has enabled consistent morphologic portrayal of the surface for global mapping (whereas previously used visual-range image bases were less effective, because they combined morphologic and albedo information and, locally, atmospheric haze).

via popsci

source USGS