Grinder Rock
Encyclopedia
Grinder Rock is the southernmost of a group of rocks extending from the southeast end of Intercurrence Island
Intercurrence Island
Intercurrence Island is an island 4.5 miles long, the largest of the Christiania Islands, lying 8 miles east-northeast of Liege Island at the northeast end of Palmer Archipelago. Though the origin of this name is unknown, it has appeared on maps for over a hundred years and its usage has been...

, in the Palmer Archipelago
Palmer Archipelago
Palmer Archipelago, also known as Antarctic Archipelago, Archipiélago Palmer, Antarktiske Arkipel or Palmer Inseln, is a group of islands off the northwestern coast of the Antarctic Peninsula....

. Shown on Argentine and Chilean government charts of 1957. The name, given by the United Kingdom Antarctic Place-Names Committee (UK-APC) in 1960, is descriptive of this toothlike feature.
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