A Sinuous segment of a simple radar-dark channel about 200 kilometers (120 miles) long and 2 kilometers (1.2 miles) wide is shown in this image. Channel outlines at both ends are indistinct, probably because of infilling by younger lavas. Thin bright returns from channel walls denote steep slopes. A transecting relict channel of approximately similar width is denoted by parallel bright margins (levees) that cross the lava plains in a northwest direction on each side of the radar-dark channel.
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