A long, narrow ice-free valley in the Convoy Range, running north from its head immediately east of Mount Gunn into the Greenville Valley. Mapped in 1957 by the New Zealand Northern Survey Party of the Commonwealth Trans-Antarctic Expedition, 1956-58. Named by them after the USNS Private Joseph F. Merrell, a freighter in the main American convoy into McMurdo Sound in the 1956-57 season.〔(Australian Antarctic Data Centre - Antarctic Gazetteer - Merrell Valley, SCAR Gazetteer Ref. No 9461 )〕