Kōrero: Geology – overview

Pillow lavas

Pillow lavas

Spectacular pillow lavas are exposed in coastal cliffs near Ōamaru, in a sequence of limestones deposited in the Eocene and Oligocene periods. They are formed when molten lava is gently erupted on the sea floor and suddenly chilled. Each pillow has a dark skin of volcanic glass and a centre of grey basalt. The pale limestone between the pillows originated as lime mud on the sea floor.

Te whakamahi i tēnei tūemi

GNS Science
Reference: CN33409/24
Photograph by Lloyd Homer

Permission of GNS Science must be obtained before any use of this image.

Ngā whakaahua me ngā rauemi katoa o tēnei kōrero

Te tuhi tohutoro mō tēnei whārangi:

Eileen McSaveney and Simon Nathan, 'Geology – overview - New Zealand breaks away from Gondwana', Te Ara - the Encyclopedia of New Zealand, http://www.TeAra.govt.nz/mi/photograph/8323/pillow-lavas (accessed 28 May 2020)

He kōrero nā Eileen McSaveney and Simon Nathan, i tāngia i te 12 Jun 2006