Geological Chronicle
Rimae Ramsden is a lunar graben structure spanning 100 kilometers in length across the lunar basalt crust. Formed by structural faulting and crustal extension, the trench cuts through terrain within the Wilhelm quadrangle (LAC-111).
Officially cataloged by the International Astronomical Union at selenographic coordinates -32.9279° latitude and -31.3218° longitude, the rille designation notes: Named from nearby crater.