Hemispheres Apart: The Martian Crustal Dichotomy

Details Hemispheres Apart: The Martian Crustal Dichotomy Hemispheres Apart: The Martian Crustal Dichotomy

Feb 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005eostr..86...46w&link_type=abstract

Eos, Transactions American Geophysical Union, Volume 86, Issue 5, p. 46-47

Mathematics

Logic

2

Planetary Sciences: Solar System Objects: Mars, Planetary Sciences: Solid Surface Planets: Interiors (8147), Planetary Sciences: Solid Surface Planets: Tectonics (8149)

Scientific paper

Mars is a world divided-divided into ancient, heavily cratered highlands in the southern hemisphere and relatively featureless lowland plains in the northern hemisphere (Figure 1). This hemispheric dichotomy is manifested not only in the topography, but also in the geology, the tectonics, the cratering record, the gravity and magnetic field, and the crustal structure. The contrast between hemispheres has been brought into sharp focus by the unprecedented amount of new data returned by the fleet of operational spacecraft in Mars orbit (Mars Global Surveyor, Mars Odyssey, and Mars Express) and on the surface (Mars Exploration Rovers). However, the origin of perhaps the most fundamental feature of the crust of Mars remains uncertain. The formation of the crustal dichotomy may have set the course for most of the subsequent geologic evolution of Mars, including the Tharsis volcanic and tectonic province.

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