Situated in southern Brabant Island, it is 4 nautical miles (7 km) long, draining the northwest slopes of Solvay Mountains and flowing west between Mount Aciar and Mount Sarnegor into the Buragara Cove of Dallmann Bay in the Palmer Archipelago.

It was shown on an Argentine government chart in 1953, but not named.

It was photographed by Hunting Aerosurveys Ltd in 1956–57, and mapped from these photos in 1959.

The glacier was named by the United Kingdom Antarctic Place-Names Committee (UK-APC) for Benjamin Rush (1745–1813), a noted American physician and philanthropist, and a signatory of the Declaration of Independence.

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