| Photo Diary |

Geology Baseline Study: Abby demonstrates how to do an acid test after cleaning the rock surface |

Geology Baseline Study: Abby writes a description of her observations and interpretation |

Geology Baseline Study: Abby labels her observations to distinguish descriptions from interpretations |

Geology Baseline Study: Brent uses his hammer to hold a size calibration card as he takes a photo |

Geology Baseline Study: Brent uses a simple seive to remove fine sand from a sample |

Geology Baseline Study: Brent records the GPS for each sample location |

Geology Baseline Study: Tools used during this EVA |

Geology Baseline Study: Abby demonstrates a scratch test using her fingernail |