USS Glacier (AGB-4) explored the parts of the Walgreen Coast and Eights Coast in 1960–61. It had parties of geologists and surveyors along that were deployed to outcrops on land. This expedition to the far eastern reaches of Marie Byrd Land determined that Thurston Peninsula as proposed by earlier expeditions was in fact an island (Thurston Island).[15] In the same season a geological party led by Campbell Craddock explored the Jones Mountains in the adjacent region.[16]