Ignimbrite also occurs in the Coromandel region of New Zealand , where the striking orange-brown ignimbrite cliffs form a distinctive feature of the landscape . The nearby Taupo Volcanic Zone is covered in extensive flat sheets of ignimbrite erupted from caldera volcanoes during the Pleistocene and Holocene . The exposed ignimbrite cliffs at Hinuera ( Waikato ) mark the edges of the ancient Waikato River course which flowed through the valley before the last major Taupo eruption 1,800 years ago ( the Hatepe eruption ) . The west cliffs are quarried to get blocks of Hinuera Stone , the name given to welded ignimbrite used for building cladding . The stone is light grey with traces of green and is slightly porous
Hatepe eruption
Hatepe eruption
Ignimbrite