Sedimentary Rock Layers in Terby Crater

Terby crater is on the northern edge of Hellas Basin at 28oS, 73oE (see below image). It is ~175 km in diameter. It is the site of an ancient lakebed, where clay deposits have been identified. This image shows some of the layers, but no valley is large enough at the northern rim of Terby to have carried the large amounts of sediments necessary to produce the layers.

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