Geological Chronicle
Rimae Theaetetus is a lunar graben structure spanning 53 kilometers in length across the lunar basalt crust. Formed by structural faulting and crustal extension, the trench cuts through terrain within the Cassini quadrangle (LAC-25).
Officially cataloged by the International Astronomical Union at selenographic coordinates 33.0351° latitude and 5.8665° longitude, the rille designation notes: Named from nearby crater.