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This image shows the Rover at work. Click on image for full size version (40K GIF) Image from:" NASA/JPL

One of the measurement objectives of the Mars Pathfinder mission was the examination of the composition and structure of the soil. As the Rover traversed the surface exploring the rocks of Mars, it also sampled the soil near those rocks. Some soil mechanics experiments were performed by spinning the Rover's wheels (mostly the rear wheels). As the wheels dug into the surface, the Rover discovered that much of the ground is made of dust, possibly deposited during many of the Martian Global Dust Storms.

Scientists have identified four types of soils in the Martian surface near the Pathfinder landing site.

• Dark Soil (dark gray)
• Bright Soil (bright red)
• Disturbed Soil (disturbed by the passage of the Rover & airbags)
• Lamb-like Soil (just found around the rock "the Lamb")

• finely grained, cloddy & rocky soil, found near the rock named Pooh Bear
• a cemented crust which couldn't be moved by the Rover's wheels, found near Pop-Tart & Scooby Doo

Results of the soil study include the fact that the soils do not seem to be the weathering products of the eroded rock nearby, thus they are not derived from the rocks nearby. Soils are similar, however, to those found at the Viking landing sites. Scientists are busy trying to figure out how these soils could have been created.

This image shows the Rover at work. Click on image for full size version (40K GIF) Image from:" NASA/JPL

One of the objectives of the Mars Pathfinder mission was the examination of the composition of the soil and how it was laid down. As the Rover traversed the surface exploring the rocks of Mars, it also sampled the soil near those rocks. Soil experiments were performed by spinning the Rover's wheels (mostly the rear wheels). As the wheels dug into the surface, the Rover discovered that much of the ground is made of dust, possibly deposited during many of the Martian Global Dust Storms.

Scientists found three types of soils in the Martian surface near the Pathfinder landing site (+ one special type).

• Dark Soil (dark gray)
• Bright Soil (bright red)
• Disturbed Soil (disturbed by the passage of the Rover & movement of the airbags, & sort of dark-red)
• Lamb-like Soil (just found around the rock "the Lamb")

This image shows the Rover at work. Click on image for full size version (40K GIF) Image from:" NASA/JPL

Spinning the Rover's rear wheels was one way for scientists to test the soil of Mars. As the wheels dug into the surface, the Rover discovered that much of the ground is made of dust, possibly deposited during many of the Martian Global Dust Storms.

Everywhere the Rover passed, it disturbed the soil, and the soil underneath turned out to be a darker red-brown soil than it's surroundings. An example of disturbed soil occured when the Rover crossed the Mermaid Dune, shown here.

Soils found by the Pathfinder's Rover seem to be different from those soils found at the Viking landing sites. Soil found around the rock the Lamb may even show that Mars had to have more water in the past!