Thumb Promontory

Thumb Promontory (84°48′S 116°18′W) is a prominent rock spur on the north side of Lackey Ridge, Ohio Range. Thumb Promontory was unofficially named by a New Zealand Antarctic Research Program (NZARP) field party to the Ohio Range, 1979–80. The name was formally proposed by geologist Margaret Bradshaw, member of a second NZARP field party, 1983–84. So named because of the similarity of the upper part of this feature to an upturned thumb from certain angles.

 This article incorporates public domain material from the United States Geological Survey document: "Thumb Promontory". (content from the Geographic Names Information System)