A hill with much exposed rock rising to 850 metres (2,790 ft) high at the west side of Flint Ridge.

Named by US-ACAN (1997) after John F. Noxon, who pioneered the technique of visible spectroscopy for measurements of stratospheric trace gases, particularly nitrogen dioxide.

In 1978, Noxon sailed on RV Hero from Ushuaia, and quickly confirmed that a "cliff" in nitrogen dioxide is also found in the Antarctic atmosphere.

A rounded rock summit rising to about 900 metres (3,000 ft) high in the east part of Noxon Cliff.

Dominion Hill bounds the north edge of Commonwealth Glacier where it descends southeastward into Taylor Valley.