A Younger Age for ALH84001 and Its Geochemical Link to Shergottite Sources in Mars

@article{Lapen2010AYA,
  title={A Younger Age for ALH84001 and Its Geochemical Link to Shergottite Sources in Mars},
  author={T. J. Lapen and Minako Righter and A. D. Brandon and Vinciane Debaille and Brian L. Beard and John T. Shafer and Anne H. Peslier},
  journal={Science},
  year={2010},
  volume={328},
  pages={347 - 351}
}
Less Old Martian Meteorite The oldest Martian meteorite known, ALH84001, was thought to be a remnant of primordial martian crust formed during solidification of an early magma ocean. Using isotope data, Lapen et al. (p. 347) revised the crystallization age of this meteorite from 4.51 billion years to 4.09 billion years ago, meaning that this rock cannot be a fragment of primordial crust that escaped the period of intense bombardment that occurred between 4.25 and 4.10 billion years ago. The… 

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