Mezzo Buttress is a rocky buttress at the head of Barilari Bay

Barilari Bay

Barilari Bay is a bay long and wide, between Cape Garcia and Loqui Point on the west coast of Graham Land. It was discovered by the French Antarctic Expedition, 1903–05, and named by Jean-Baptiste Charcot for Rear Admiral Atilio S. Barilari, Argentine Navy. It was re-charted by the British...

 just east of Lawrie Glacier

Lawrie Glacier

Lawrie Glacier is a glacier flowing into the head of Barilari Bay between Mount Genecand and Mezzo Buttress, on the west coast of Graham Land. Charted by the British Graham Land Expedition under Rymill, 1934-37. Named by the United Kingdom Antarctic Place-Names Committee in 1959 for Robert...

, on the west coast of Graham Land

Graham Land

Graham Land is that portion of the Antarctic Peninsula which lies north of a line joining Cape Jeremy and Cape Agassiz. This description of Graham Land is consistent with the 1964 agreement between the British Antarctic Place-names Committee and the US Advisory Committee on Antarctic Names, in...

. Charted by the British Graham Land Expedition

British Graham Land Expedition

A British expedition to Graham Land led by John Lachlan Cope took place between 1920 and 1922. The British Graham Land Expedition was a geophysical and exploration expedition to Graham Land in Antarctica between 1934 to 1937. Under the leadership of John Riddoch Rymill, the expedition spent two...

 (BGLE) under Rymill, 1934-37. So named by the United Kingdom Antarctic Place-Names Committee (UK-APC) in 1959 because the face of this buttress is conspicuously divided diagonally, half being composed of black rock and the other half of red rock.