EAS206 Study Guide - Quiz Guide: Olivine, Pancam, Italian Space Agency

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The large difference between the two halves of mars between the southern highlands (heavily cratered) and the northern lowlands. Mechanism unknown - yet the leading hypothesis is the giant impact. Relief along the escarpment = 2 3 km. Kind of tectonic activity - not like the earth. But surface rocks less dense (2. 7-3. 0 g/cm3) Significant amount of sulfur in the core. No active dynamo (the thing that generates the magnetic field inside planets) Originally from degassing from the interior, but the atmosphere has become thinner over time - mostly through loss of gases. More data expected about the inside in the near future. Stage 1: accretion and differentiation, 4. 56 ga. Degassing to make primordial atmosphere & hydrosphere. Stage 2: noachian epoch, 4. 56 3. 8 ga. Stage 3: early hesperian, 3. 8 3. 7 ga. Stage 4: late hesperian, 3. 7 3. 0 ga. Deposition of eolian, fluvial sediments and flood basalts in northern lowlands. Stage 5: late hesperian/early amazonian, 3. 5 2. 3 ga.

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