Maroa

Photo of this volcano
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 38.42°S
  • 176.08°E

  • 897 m
    2942 ft

  • 241061
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

Most Recent Weekly Report: 28 March-3 April 2001 Citation IconCite this Report


On 30 March the IGNS reported that a moderate-sized hydrothermal explosion occurred in the Alum Lakes area, Wairakei, knocking over trees and destroying vegetation near the crater. Water levels at several of the Alum Lakes had dropped several weeks before the explosion.

Source: GeoNet

Weekly Reports - Index


2001: March


28 March-3 April 2001 Citation IconCite this Report


On 30 March the IGNS reported that a moderate-sized hydrothermal explosion occurred in the Alum Lakes area, Wairakei, knocking over trees and destroying vegetation near the crater. Water levels at several of the Alum Lakes had dropped several weeks before the explosion.

Source: GeoNet


The Global Volcanism Program has no Bulletin Reports available for Maroa.

Eruptive History


Summary of Holocene eruption dates and Volcanic Explosivity Indices (VEI).


Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
0180 (?) Unknown Confirmed   Tephrochronology Orakeikorako
7050 BCE (?) Unknown Confirmed   Tephrochronology Orakeikorako

This compilation of synonyms and subsidiary features may not be comprehensive. Features are organized into four major categories: Cones, Craters, Domes, and Thermal Features. Synonyms of features appear indented below the primary name. In some cases additional feature type, elevation, or location details are provided.

Photo Gallery


Ngahigo lava dome is one of at least 70 post-caldera lava domes erupted within the Maroa caldera, which formed sometime after about 230,000 years ago north of the Taupo caldera. The youngest of the post-caldera lava domes is Puketarata, which was emplaced within a rhyolitic tuff ring about 14,000 years ago. The domes were erupted along a general SW-NE trend, parallel to the structural trend of the Taupo volcanic zone. No Holocene eruptions have occurred, but vigorous thermal activity continues.

Photo by Ichio Moriya (Kanazawa University).
See title for photo information.
Spectacular siliceous sinter terraces at Orakeikorako cover an area of about 1 cu km, forming one of New Zealand's most impressive thermal areas. The thermal area lies along the Waikato River at an altitude of 260-360 m on the eastern side of the Maroa volcanic center. Hydrothermal explosions took place at five centers at Orakeikorako prior to the Taupo pumice eruption about 1800 years ago, depositing explosion breccias that immediately underlie the Taupo Pumice.

Photo by Richard Wysoczanski, 1994 (Smithsonian Institution).
See title for photo information.
Algae colors the surface of spectacular siliceous sinter terraces at the Orakeikorako thermal area. This geothermal area is one of the principal hydrothermal fields of the Taupo volcanic zone. It lies on the banks of the Waikato River where the Paeroa Fault divides into smaller branches that intersect the eastern margin of the Maroa volcanic center. Orakeikorako contains sinter sheets covering an area of about 1 cu km. Flooding of the river hydroelectric power generation has drowned about 70% of the hot springs.

Photo by Richard Wysoczanski, 1994 (Smithsonian Institution).
See title for photo information.

Smithsonian Sample Collections Database


The following 8 samples associated with this volcano can be found in the Smithsonian's NMNH Department of Mineral Sciences collections. Catalog number links will open a window with more information.

Catalog Number Sample Description
NMNH 116566-10 Volcanic
NMNH 116566-11 Volcanic
NMNH 117454-37 Perlite
NMNH 117454-38 Perlite
NMNH 117454-39 Obsidian
NMNH 117454-40 Perlite
NMNH 117454-41 Obsidian
NMNH 117454-42 Pumice

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