Overview of the Mars Pathfinder Mission and Assessment of Landing Site Predictions

TLDR

Mars Pathfinder analyses show high‑silica rocks from differentiated parent bodies, fluvial‑derived pebbles and conglomerates indicating a warmer, wetter past, magnetized dust implying hydrologic leaching, and remote‑sensing data that correctly predicted a dust‑free rocky plain safe for landing and rover exploration. The moment of inertia indicates a central metallic core of 1300 to 2000 km in radius.

Abstract

Chemical analyses returned by Mars Pathfinder indicate that some rocks may be high in silica, implying differentiated parent materials. Rounded pebbles and cobbles and a possible conglomerate suggest fluvial processes that imply liquid water in equilibrium with the atmosphere 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 approximately 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.