Geological Chronicle
Rimae Darwin is a lunar graben structure spanning 170 kilometers in length across the lunar basalt crust. Formed by structural faulting and crustal extension, the trench cuts through terrain within the Byrgius quadrangle (LAC-92).
Officially cataloged by the International Astronomical Union at selenographic coordinates -19.8416° latitude and -66.6562° longitude, the rille designation notes: Named from nearby crater.