Mount Warrnambool is a single large scoria cone volcano that is 216 metres (709 ft) high.

The tuff forms a partial ring around the east and north sides of the volcano.

The tuff here is hardened, but was formed due to volcanic ash falling from the air.

Structures visible in the quarry include a base surge and volcanic bomb sag.

An access track to a fire tower on the summit is not open to public.