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Ngahape, Wairarapa, Wellington Region, North Island, New Zealand

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Latitude & Longitude (WGS84): 41° 8' 43'' South , 175° 54' 14'' East
Latitude & Longitude (decimal): -41.14531,175.90389
Köppen climate type:Cfb : Temperate oceanic climate

Ngahape is a remote area about 50-60 kilometres by road south-east of Masterton. Three kilometres east of this town on the Masterton-Castle Point Road, turn south onto the Masterton-Stronvar Road. This winds its way south-east through farming back blocks, requiring a good map to negotiate several intersections. The latter part of the road becomes gravel, and gradually deteriorates as it enters the Ngaumu Forest, ending abruptly at a non descript spot that once held a school. In recent years the local forestry company has blocked access to various roads in the area.

Most sources focus on igneous rocks, and district wide rock units. (Moore, 1980) provides useful brief geology summary for the district in his introduction. The sequence base to top is sandstone, conglomerate, minor sandstone of the Glenburn Formation, thin bedded sandstone and mudstone of the Te Mai Formation, siltstone of the Whangai Formation, black siltstone of the Waipawa Formation, and glauconitic sandstone of the Huatokitoki Formation. This sequence is faulted against Cretaceous sandstone and siltstone of the Pahaoa Formation to the west, and overlain by Miocene sediments to the east. Shallow dolerite and basalt intrusions of the Ngahape Volcanic Complex are found in the upper parts of the sequence. The major Motuwaireka Formation trends north north-east, with other faults in the area called Adam, Pukeroro, and Kaumingi.

Analcime was confirmed in the area but only in petrology thin slices, as part of the Red Hill/Volcano Road Quarry location.

Mineral List

3 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

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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 Macrostrat.org

Langhian - Chattian
13.82 - 28.1 Ma

ID: 1347100
Early Miocene Whakataki Formation sandstone and mudstone (Palliser Group)

Age: Cenozoic (13.82 - 28.1 Ma)

Stratigraphic Name: Whakataki Formation

Description: Well bedded alternating sandstone and mudstone with interbedded olistostrome deposits.

Comments: Neogene sedimentary rocks. Age based on micropaleontology macropaleontology

Lithology: Major:: {sandstone},Minor:: {mudstone, limestone, conglomerate, breccia}

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

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]

Late Cretaceous
66 - 100.5 Ma

ID: 1313144
Tinui and Mangapurupuru groups

Age: Late Cretaceous (66 - 100.5 Ma)

Stratigraphic Name: Tinui Group; Mangapurupuru Group

Description: Sandstone and mudstone, locally glauconitic, with minor conglomerate, breccia, limestone and tuff; locally includes basalt lavas and breccia.

Comments: Zealandia Megasequence Mainly Marine Sedimentary Rocks (Paleogene to Cretaceous)

Lithology: Sandstone, mudstone, conglomerate, breccia, limestone, tuffite, basalt, breccia

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 Macrostrat.org, used under Creative Commons Attribution 4.0 License

This page contains all mineral locality references listed on mindat.org. 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 mindat.org 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)
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.
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.
Ansin, R.L. (1970) Recent mineral discoveries. New Zealand Lapidary Journal 3:19-22.
Wellman, P. (1970) Geology of the Ngahape Area eastern Wairarapa, Victoria University of Wellington, 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 Journal of Geology and Geophysics, 23:2, 167-177.
Railton, G.L¹., Watters, W.A. (1990) Minerals of New Zealand. New Zealand Geological Survey Bulletin 104, 89 pages. (¹published as G.L. Railton but his initials should be G.T. not G.L. - Errata sheet inserted in publication).
New Zealand Herald newspaper (2016) Wairarapa Paper Road Row Drags On, 30 March 2016.

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