What feature did Opportunity examine at Endurance Crater walls that strongly indicated deposition by flowing water?

Answer

Distinct, thick layers resembling sedimentary bedding

As Opportunity traveled across Meridiani Planum, its investigation of crater walls provided crucial stratigraphic information. When the rover reached Endurance Crater, it was able to analyze the exposed cross-section of the crater rim. This cross-section revealed distinct, thick layering within the rock structure. These visible layers strongly resembled sedimentary bedding structures commonly formed by the deposition of material carried and settled by moving liquid, such as what occurs in riverbeds or along ancient shorelines here on Earth. This visual evidence provided robust confirmation that significant sedimentation driven by flowing water had taken place over geological timescales in that region.

What feature did Opportunity examine at Endurance Crater walls that strongly indicated deposition by flowing water?

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