Abstract
Chemical analyses returned by Mars Pathfinder indicate that some rocks may be high in silica. Implying diffentiated parent materials. Rounded pebbles and cobbles and a possible conglomerate suggest fluvial processes that imply liquid water in equilibrium with the atmospher and thus a warmer and wetter past. The moment of inertia indicates a central metallic core of 1300 to 2000 kilometers in radius. Composite airborne dust particles appear magnetized by freeze-dried maghemite stain or cement that may have been leached from crustal materials by an active hydrologic cycle. Remote-sensing data at a scale of generally greater than ~1 kilometer and an Earth analog correctly predicted a rocky plain safe for landing and roving with a variety of rocks deposited by catastrophic floods that are relatively dust-free.
Original language | English (US) |
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Pages (from-to) | 1743-1748 |
Number of pages | 6 |
Journal | Science |
Volume | 278 |
Issue number | 5344 |
DOIs | |
State | Published - Dec 5 1997 |
ASJC Scopus subject areas
- General