[1] Mount Giles was discovered on aerial flights from the West Base of the United States Antarctic Service (USAS) in 1940.

It was named for Walter R. Giles technical sergeant, United States Marine Corps (USMC), copilot and radio operator on some of these flights.

[2] Layered gabbro crops out at Mount Giles, holding quartz-free plagioclase, clinopyroxene and olivine.

A line of cliffs, 360 metres (1,180 ft) high, which surmount the east side of the terminus of Frostman Glacier.

The spur terminates in a small rock bluff about 1 nautical mile (1.9 km; 1.2 mi) west of lower Hull Glacier.