This image shows two branches of one of the extremely long lava channels, or “canali,” on the surface of Venus. A map view of the entire channel is shown in the upper right, with a red box indicating the area covered by the image. This lava channel system, centered at 55.5°S, 171.0°E, has a total length of 740 kilometers. Several dozen canali have been identified, and the longest of these extends nearly 7000 kilometers. The canali have been used as a stratigraphic time marker (e.g., wrinkle ridges appear to deform and postdate the channel). In the lower left, lava carried by a channel appears to have overflowed the channel banks, leaving a radar-bright surface.
Map of channel and measurements supplied by Ben Bussey (Lunar and Planetary Institute).