The Apollo 15 mission visited Hadley Rille near the Apennine Mountains (26.4°N, 3.7°E). Hadley Rille is a sinuous rille that was probably formed as a lava channel not unlike the Hawaiian example shown in slide #9, except that the lunar example is much larger than any lava channel found on Earth. In the foreground we can see astronaut James Irwin attending the lunar rover. At this locality, Hadley Rille is approximately 1.5 kilometers wide and approximately 300 meters deep.
Apollo 15 AS15-85-11451.