Zilch Cliffs () is a series of steep cliffs that mark the east extremity of McDonald Heights near the coast of

Marie Byrd Land Marie Byrd Land (MBL) is an unclaimed region of Antarctica. With an area of , it is the largest unclaimed territory on Earth. It was named after the wife of American naval officer Richard E. Byrd, who explored the region in the early 20th centur ...

. The cliffs were photographed from aircraft of United States Antarctic Service (USAS), 1939–41, and were mapped in detail from U.S. Navy air photos and United States Geological Survey (USGS) surveys, 1959–65. Named by

Advisory Committee on Antarctic Names The Advisory Committee on Antarctic Names (ACAN or US-ACAN) is an advisory committee of the United States Board on Geographic Names responsible for recommending commemorative names for features in Antarctica. History The committee was established ...

(US-ACAN) for Lieutenant Commander C.H. Zilch, U.S. Navy, Officer-in-Charge of the meteorological support unit during Operation Deep Freeze 1966.

References

Cliffs of Marie Byrd Land {{MarieByrdLand-geo-stub