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Code Name Min age Max Age
AK Auckland Volcanic Field 0.0 MA 0.14 MA
AKA Akaroa Volcanic Group 8.0 MA 9.1 MA
ALX Alexandra Volcanic Group 1.6 MA 2.92 MA
ARN Tauperikaka Coal Measures, Whakapohai Sandstone, Arnott Volcanics 60.0 MA 84.0 MA
BOI Kaikohe-Bay of Islands Volcanic Field 0.059 MA 11.199 MA
BRO Brothers Volcanics 21.7 MA 27.299 MA
BST Brook Street Volcanics Group 245.0 MA 299.0 MA
COO Cookson Volcanics Group 26.5 MA 31.0 MA
COR Coromandel Volcanic Zone 1.2 MA 18.5 MA
DEB Deborah Volcanics 29.0 MA 33.0 MA
DEV Devil River Volcanics Group 477.0 MA 545.0 MA
DIA Diamond Harbour Volcanic Group 5.8 MA 8.1 MA
DUN Dunedin Volcanic Group 10.0 MA 21.0 MA
EGM Egmont Volcanic Centre 0.0 MA 2.588 MA
GRA Grasseed Volcanics 42.7 MA 53.099 MA
HER Mount Herbert Volcanic Group 8.0 MA 9.699 MA
KAR Karewa Volcanic Formation 0.51 MA 0.51 MA
KAT Kathryn Metavolcanics 486.2 MA 513.0 MA
KIW Kiwitahi Volcanic Group 5.5 MA 16.0 MA
LIV Livingstone Volcanics Group 248.0 MA 295.0 MA
LYT Lyttelton Volcanic Group 9.699 MA 11.0 MA
MAN1 Mangakino Volcanic Centre, Taupo Volcanic Zone 0.649 MA 0.769 MA
MAN2 Mangakino Volcanic Centre 0.136 MA 1.809 MA
MAR Maroa Volcanic Centre 0.0 MA 0.523 MA
MAT Matakaoa Volcanic Group 65.0 MA 98.9 MA
NHP Ngahape Volcanic Complex 58.0 MA 80.0 MA
NTT Ngatutura volcanic field 1.54 MA 1.83 MA
OKA Okataina Volcanic Centre 0.0 MA 0.74 MA
OTH Other volcanic areas 0.0 MA 146.0 MA
PAR Park Volcanics Group 205.0 MA 215.0 MA
RAN Rangiawhia Volcanics 104.0 MA 131.0 MA
REP Reporoa Volcanic Centre, Taupo Volcanic Zone 0.219 MA 0.239 MA
RIP Rip Volcanics 98.9 MA 142.0 MA
ROT1 Ohakuri, Kapenga and Rotorua volcanic centres, Taupo Volcanic Zone 0.128 MA 0.523 MA
ROT2 Ohakuri, Kapenga and Rotorua volcanic centres 0.0 MA 0.523 MA
SAK South Auckland Volcanic Field 0.071 MA 1.59 MA
SOL Solander Island Volcanics 0.15 MA 0.4 MA
SOM Mount Somers Volcanics Group 79.0 MA 98.5 MA
TAH Tahuna Volcanic Centre 6.4 MA 6.8 MA
TAN Tangihua Complex 28.5 MA 146.0 MA