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Volcano Road Quarry, Red Hill, Wairarapa, Wellington Region, North Island, New Zealand

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Latitude & Longitude (WGS84): 41° 4' 18'' South , 175° 56' 28'' East
Latitude & Longitude (decimal): -41.07189,175.94139
Köppen climate type:Cfb : Temperate oceanic climate
Other/historical region names associated with this locality:Ngahape

Forestry roading material quarry in highly weathered teschenite and basalt, and part of a large and techtonically uplifted seamount. Teschenite is the key matrix rock, with all other minerals being secondary. Remains of several volcanic pipes have been found.

Various sceptres of quartz and calcite can be found at the micro level in this location, including unusual dipyramidal quartz diamonds. This is a privately owned forest with no public access. Collecting as per arranged field trips of the Wellington mineral and rock club.

(Wellman 1970) describes it as a circular teschenite intrusion in the Brocken Range suggesting it is possibly an eroded volcanic plug. He states attractive hand specimens of agate and quartz after calcite can be commonly found in the Kaiwhata Stream.

(Hutton, 1942) studied in detail several rocks from Red Hill, collected shortly before by D.A. Brown. Species described include a diopsidic type of clinopyroxene and augite; sheaf like aggregates of colourless thomsonite as sharp acicular needles, associated with minor natrolite; an amorphous green-blue to rusty brown hydrated silicate of magnesium and iron infilling amygdales; plagioclase with intrusions of apatite, biotite, and hematite; irregular aggregates of bowlingite; sphene with no details; analcime plentiful in thin sections; abundant ilmentite-hematite; pale yellow apatite needles, and calcite.

Quartz and pale amethyst crystals can be found in the Little Kaiwhata Stream that drains Red Mountain. The crystals are surrounded by a white to pale pink material, changing to an orange colour in acid, suggested as either calcite or more likely dolomite. Red coloured heulandite, manganese oxides, greenockite, and celadonite are also noted as found.

Mineral List

16 valid minerals.

Rock Types Recorded

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Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on

66 - 145 Ma

ID: 3186880
Mesozoic sedimentary and volcanic rocks

Age: Cretaceous (66 - 145 Ma)

Lithology: Flow(s); mafic volcanic rocks; spilite; argillite,siltstone,conglomerate,greensand,sandstone,shale

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Cenomanian - Aptian
93.9 - 125 Ma

ID: 1319395
Mangapokia Formation sandstone (Pahaoa Group)

Age: Cretaceous (93.9 - 125 Ma)

Stratigraphic Name: Mangapokia Formation

Description: Highly deformed alternating sandstone and mudstone.

Comments: Basement (Eastern Province) sedimentary rocks. Age based on micropaleontology macropaleontology

Lithology: Major:: {sandstone},Minor:: {mudstone, argillite, conglomerate, basalt, boninite}

Reference: Heron, D.W. . Geology Map of New Zealand 1:250 000. GNS Science Geological Map 1. [13]

Early Cretaceous
100.5 - 145 Ma

ID: 1310751
Pahaoa Group

Age: Early Cretaceous (100.5 - 145 Ma)

Stratigraphic Name: Pahaoa Group

Description: Sandstone and mudstone with minor conglomerate, chert and spilitic volcanics.

Comments: Eastern Province (Torlesse Composite Terrane) Rocks

Lithology: Sandstone, mudstone, conglomerate, chert, spilite

Reference: Edbrooke, S.W., Heron, D.W., Forsyth, P.J., Jongens, R. (compilers). Geology Map of New Zealand 1:1 000 000. GNS Science Geological Map 2. [12]

Data and map coding provided by, used under Creative Commons Attribution 4.0 License

This page contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Hutton, C.O. (1942) The igneous rocks of the Brocken Range-Ngahape area Eastern Wellington, Transactions and Proceedings of the Royal Society of New Zealand, 01 January 1942.
Brown, D.A. (1942) The Geology of the Brocken Range and Kaiwhata Valley East Wellington, Transactions and Proceedings of the Royal Society of New Zealand, 01 January 1942.
Wellman, P. (1970) Geology of the Ngahape Area eastern Wairarapa, Victoria University of Wellington New Zealand, Transactions of the Royal Society of New Zealand, Earth Sciences, 8:11, 14 October 1970.
Moore, P.R. (1980) Late Cretaceous-Tertiary stratigraphy structure and tectonic history of the area between Whareama and Ngahape eastern Wairarapa New Zealand, New Zealand Journal of Geology and Geophysics, 23:2, 167-177.

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