Geological Chronicle
Rima Euler is a lunar graben structure spanning 104.97 kilometers in length across the lunar basalt crust. Formed by structural faulting and crustal extension, the trench cuts through terrain within the Aristarchus quadrangle (LAC-39).
Officially cataloged by the International Astronomical Union at selenographic coordinates 21.0842° latitude and -30.3121° longitude, the rille designation notes: Named from nearby crater.