Pyroclastic Activity at Home Plate in Gusev Crater, Mars

@article{Squyres2007PyroclasticAA,
  title={Pyroclastic Activity at Home Plate in Gusev Crater, Mars},
  author={Steven W. Squyres and Oded Aharonson and Benton C. Clark and Barbara A. Cohen and Larry S. Crumpler and Paulo A. de Souza and William H. Farrand and Ralf Gellert and John A. Grant and John P. Grotzinger and Albert F. C. Haldemann and J. R. Johnson and G{\"o}star Klingelh{\"o}fer and Kevin W. Lewis and R. Li and Timothy J. Mccoy and Alfred S. McEwen and Harry Y. McSween and Doug W. Ming and J. M. Moore and Richard V. Morris and Timothy J. Parker and James William Rice and Steven W. Ruff and M. E. Schmidt and Christian Schr{\"o}der and Laurence A. Soderblom and Albert S. Yen},
  journal={Science},
  year={2007},
  volume={316},
  pages={738 - 742}
}
Home Plate is a layered plateau in Gusev crater on Mars. It is composed of clastic rocks of moderately altered alkali basalt composition, enriched in some highly volatile elements. A coarsegrained lower unit lies under a finer-grained upper unit. Textural observations indicate that the lower strata were emplaced in an explosive event, and geochemical considerations favor an explosive volcanic origin over an impact origin. The lower unit likely represents accumulation of pyroclastic materials… 
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The Mars Exploration Rover Spirit investigated the igneous and alteration mineralogy and chemistry of Home Plate and its surrounding deposits. Here, we focus on using thermochemical modeling to
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