whinstone
/ˈwɪnstoʊn/
noun
- A hard, dark-colored rock, such as basalt or dolerite, often used in construction or road building.
- Workers quarried whinstone to pave the new roads in the village.
- The old wall was built from local whinstone, giving it a rough, dark appearance.
- Geologists identified the cliff as whinstone because of its dense, black texture.