An example is Mount Wellington, Auckland in New Zealand, which like the Three Kings in the south of the same city has been extensively quarried.
scoria |
Duders Hill (also Takamaiiwaho) was a 20 metre high scoria mound located on the Devonport coast, on the lower south-east slopes of Mount Victoria, in the Auckland Volcanic Field.
The buildings, designed by Reader Wood, date from 1858 and are built of scoria rock quarried on the volcanic island of Rangitoto.
Despite its name the mountain features very little scoria, with most of the mountain made up of vesicular basalt.