QUESTION: What are some good references about Mars soil mechanics and geology? ANSWER from Mike Mellon on January 30, 1998: I can suggest some references for Mars that would provide a good starting point. Note that there is a large body of Mars literature and so I can't give a complete list by any means. General books about Mars, including the geology: - Carr, M. H., The surface of Mars, Yale University Press, 1981. - Kieffer, H. H., et al., eds., Mars, University of Arizona Press, 1992. Articles that may provide useful information: - Arvidson, R. E., et al., The martian surface as imaged, sampled, and analyzed by the Viking landers, Reviews in Geophysics and Space Physics, vol 27, pp 39-60, 1989. - Moore, H. J., et al., A summary of Viking sample trench analyses for angles of internal friction and cohesions, Journal of Geophysical Research, vol 87, pp 10043-10050, 1982. A collection of papers for Pathfinder preliminary results can be found in a recent issue of the journal "Science", vol 278, 5 December 1997. Keep in mind that these results are preliminary and it will take years to fully sort through the data. These books and journal articles are a bit on the technical side might best be located at a university library or through a community library by interlibrary loan. The books and recent Science issue would also be available for purchase through a books store or the publisher directly. The library will be the least costly. - Mike Mellon