Jetsam Moraine is a thin, sinuous medial moraine that arcs smoothly for 6 nautical miles (11 km) from a point near Mount Razorback

Mount Razorback

Mount Razorback is a craggy mountain rising to about 1,600 m east of Staten Island Heights in the Convoy Ridge, Victoria Land. The descriptive name was applied by the 1957 New Zealand Northern Survey Party of the Commonwealth Trans-Antarctic Expedition, 1956-58....

 to beyond the far (NE) side of Black Pudding Peak

Black Pudding Peak

Black Pudding Peak is an isolated black mountain located northwest of Mount Brogger in the Prince Albert Mountains, Victoria Land. It was named for its squat black appearance by the 1957 New Zealand Northern Survey Party of the Commonwealth Trans-Antarctic Expedition, 1956–58....

, in Prince Albert Mountains

Prince Albert Mountains

The Prince Albert Mountains are a major mountain group in Antarctica over 320 km long. Located in Victoria Land, they run north-south between the Priestley and Ferrar glaicers....

, Victoria Land

Victoria Land

Victoria Land is a region of Antarctica bounded on the east by the Ross Ice Shelf and the Ross Sea and on the west by Oates Land and Wilkes Land. It was discovered by Captain James Clark Ross in January 1841 and named after the UK's Queen Victoria...

. Its curved trajectory marks the contact between Benson Glacier

Benson Glacier

Benson Glacier is a glacier about long, draining the east part of Flight Deck Neve and continuing east between Fry Glacier and Mackay Glacier into the north part of Granite Harbour where it forms a floating tongue...

 ice and that of Midship Glacier

Midship Glacier

Midship Glacier is a broad flat glacier filling the bulk of Alatna Valley and having its origin on the slopes of Mount Morrison to the south, in Convoy Range, Victoria Land. From 1957 this ice body was considered part of Benson Glacier...

. So named by a 1989-90 New Zealand Antarctic Research Program (NZARP) field party from association with Flotsam Moraines

Flotsam Moraines

Flotsam Moraines is the moraines trailing northeastward from Mount Morrison, trapped in the ice eddies between Midship Glacier and ice from local mountainside glaciers, in Prince Albert Mountains, Victoria Land...

 and because all supraglacial moraines are "floating" on the glacier

Glacier

A glacier is a large persistent body of ice that forms where the accumulation of snow exceeds its ablation over many years, often centuries. At least 0.1 km² in area and 50 m thick, but often much larger, a glacier slowly deforms and flows due to stresses induced by its weight...

ice, and drift similar to flotsam and jetsam.