Grinder Island is one of the ice-covered islands in Marshall Archipelago

Marshall Archipelago

Marshall Archipelago is an extensive group of large ice-covered islands within Sulzberger Ice Shelf. Several of the islands were discovered and plotted by the Byrd Antarctic Expeditions and by the United States Antarctic Service , all led by Admiral Byrd...

, located within Sulzberger Ice Shelf, coastal Marie Byrd Land

Marie Byrd Land

Marie Byrd Land is the portion of West Antarctica lying east of the Ross Ice Shelf and the Ross Sea and south of the Pacific Ocean, extending eastward approximately to a line between the head of the Ross Ice Shelf and Eights Coast. It stretches between 158°W and 103°24'W...

. The island

Island

An island or isle is any piece of sub-continental land that is surrounded by water. Very small islands such as emergent land features on atolls can be called islets, cays or keys. An island in a river or lake may be called an eyot , or holm...

 is 7 nautical miles (13 km) long and 1 nautical mile (1.9 km) wide and lies 13 nautical miles (24 km) southwest of Steventon Island

Steventon Island

Steventon Island is a broad ice-covered island about long, lying west of Court Ridge in the Sulzberger Ice Shelf. It was mapped from surveys by the United States Geological Survey and U.S. Navy air photos , and named by the Advisory Committee on Antarctic Names for Richard F. Steventon, USN,...

. Mapped by United States Geological Survey

United States Geological Survey

The United States Geological Survey is a scientific agency of the United States government. The scientists of the USGS study the landscape of the United States, its natural resources, and the natural hazards that threaten it. The organization has four major science disciplines, concerning biology,...

 (USGS) from surveys and U.S. Navy air photos, 1959-65. Named by Advisory Committee on Antarctic Names

Advisory Committee on Antarctic Names

The Advisory Committee on Antarctic Names is an advisory committee of the United States Board on Geographic Names responsible for recommending names for features in Antarctica...

 (US-ACAN) for Harry W. Grinder, aviation structural mechanic, U.S. Navy, of McMurdo Station

McMurdo Station

McMurdo Station is a U.S. Antarctic research center located on the southern tip of Ross Island, which is in the New Zealand-claimed Ross Dependency on the shore of McMurdo Sound in Antarctica. It is operated by the United States through the United States Antarctic Program, a branch of the National...

, 1967.