Ground‐based bedding orientation measurements are critical to determine the geologic history and processes of sedimentation in Gale crater, Mars. We constrain the dip of lacustrine strata of the Blunts Point, Pettegrove Point, and Jura members of the Murray formation using a combination of regional stratigraphic correlations and bed attitude measurements from stereo Mastcam images taken by the Mars Science Laboratory Curiosity rover. In situ bed attitude measurements using a principal component analysis‐based regression method reveal a wide range of dips and dip azimuths owing to a combination of high stereo errors, postdepositional deformation of strata (e.g., fracturing, rotation, and impact cratering), and different primary depositional dips. These constrain regional dips to be within several degrees of horizontal on average. Stratigraphic correlations between targets observed in the Glen Torridon trough and at the Pettegrove Point‐Jura member contact of Vera Rubin ridge (VRR) constrain dips to be between 3°SE and 2°NW, consistent with nearly flat strata deposited horizontally on an equipotential surface. The Jura member is determined to be stratigraphically equivalent to the northern portion of the Glen Torridon trough. Rover‐based dip magnitudes are generally significantly shallower than the orientation of VRR member contacts measured from High Resolution Imaging Science Experiment‐based traces, suggesting the sedimentary strata and VRR member contacts may be discordant.

中文翻译：

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维拉鲁宾岭上的原位倾角测量和地层相关性揭示了夏普山群的区域结构定向

地面层理取向测量对于确定火星大风火山口的地质历史和沉积过程至关重要。我们结合区域地层相关性和火星科学实验室好奇号探测器拍摄的立体Mastcam影像，结合了穆雷地层钝角点，佩特格罗夫点和朱拉成员的湖相地层倾角。使用基于主成分分析的回归方法进行的原地床姿态测量显示，由于高立体误差，地层的沉积后变形（例如，裂缝，旋转和撞击坑）的不同，倾角和倾角范围很广初次沉积倾角。这些将区域倾斜平均限制在水平数度之内。在格伦托里登海槽和维特鲁宾山脊（VRR）的Pettegrove Point-Jura成员接触中观测到的目标之间的地层相关性将俯冲限制在3°SE和2°NW之间，这与等电位面上水平沉积的近乎平坦的地层一致。侏罗纪成员被确定为在地层上等同于格伦托里登海槽北部。基于流动站的倾角幅度通常比根据高分辨率成像科学实验痕迹测量的VRR成员触角的方向浅，这表明沉积层和VRR成员触角可能不一致。与等电位面上水平沉积的近乎平坦的地层一致。侏罗纪成员被确定为在地层上等同于格伦托里登海槽北部。基于流动站的倾角幅度通常比根据高分辨率成像科学实验痕迹测量的VRR成员触角的方向浅，这表明沉积层和VRR成员触角可能不一致。与等电位面上水平沉积的近乎平坦的地层一致。侏罗纪成员被确定为在地层上等同于格伦托里登海槽北部。基于流动站的倾角幅度通常比根据高分辨率成像科学实验痕迹测量的VRR成员触角的方向浅，这表明沉积层和VRR成员触角可能不一致。