A thin pebbly mudstone unit which lies on a Devonian-Permian disconformity at Mount Feather and Mount Fleming in the Dry Valleys of Antarctica is interpreted as a glacial-fluvial deposit and is correlated with Upper Paleozoic tillites farther to the south. These glacial beds are composed of two lithologies: mudstone (till) and channel sandstones (water-laid sands). This marks the northernmost known exposure of Paleozoic tillites in Victoria Land.

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