Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Greenwell Glacier is a major tributary glacier of Antarctica, 72 km long, draining northwest between Mirabito Range and Everett Range to enter Lillie Glacier below Mount Works, in northwest Victoria Land. Mapped by USGS from surveys and U.S. Navy aerial photography, 1960-63. Named by US-ACAN for Cdr. Martin D. Greenwell, USN, Commander of Antarctic Squadron Six (VX-6), 1961-62. A glacier is a large persistent body of ice that forms where the accumulation of snow exceeds its ablation (melting and sublimation) over many years, often centuries.