Stratigraphy in Gale Crater
![Stratigraphy in Gale Crater](https://planetary.s3.amazonaws.com/web/assets/pictures/_768x558_crop_center-center_60_line/20170407_strat-column-gale.jpg 768w, https://planetary.s3.amazonaws.com/web/assets/pictures/_576x418_crop_center-center_60_line/20170407_strat-column-gale.jpg 576w)
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