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Pudding Island, Portobello, Otago Peninsula, Dunedin City, Otago Region, New Zealandi
Regional Level Types
Pudding IslandIsland
PortobelloTown
Otago PeninsulaPeninsula
Dunedin CityCity
Otago RegionRegion
New ZealandCountry

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Latitude & Longitude (WGS84):
45° 50' 18'' South , 170° 38' 25'' East
Latitude & Longitude (decimal):
-45.83841,170.64046
GeoHash:
G#: pzc75p2ef
GRN:
S31E87
Type:
Island
KΓΆppen climate type:
Cfb : Temperate oceanic climate
Mindat Locality ID:
236668
Long-form identifier:
mindat:1:2:236668:8
GUID (UUID V4):
82596d80-260c-4210-a960-ce7913e0895f


Pudding Island is a nature reserve, which can be walked to at low tide.

The Dunedin area is part of a Miocene aged 29 kilometre diameter complex eroded shield volcano. Pudding Island is around the centre of the volcano, showing on the island as crudely pillow basalt. Generally in the Port Chalmers-Portobello area is notable for massive vent filling agglomerate, and numerous dykes cutting earlier trachyte and trachytic tuff.

Portobello contains a marine research facility. The harbour is noted for its marine mammals, penguins, and albatrosses.

Pseudomorphs after nepheline have previously been regarded as talc after nepheline, however it now appears that these are in fact partial aluminoceladonite pseudomorphs after nepheline (see Graham et.al. 2018).

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


7 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

β“˜ Aegirine
Formula: NaFe3+Si2O6
β“˜ Aluminoceladonite
Formula: K(MgAl◻)(Si4O10)(OH)2
β“˜ Analcime
Formula: Na(AlSi2O6) · H2O
β“˜ Edenite
Formula: NaCa2Mg5(Si7Al)O22(OH)2
β“˜ 'Fayalite-Forsterite Series'
β“˜ 'Hornblende Root Name Group'
Formula: ◻Ca2(Z2+4Z3+)(AlSi7O22)(OH,F,Cl)2
β“˜ Kaolinite
Formula: Al2(Si2O5)(OH)4
Description: Pale bluish pseudomorphs after nepheline.
β“˜ Nepheline
Formula: Na3K(Al4Si4O16)
β“˜ Sanidine
Formula: K(AlSi3O8)

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 9 - Silicates
β“˜Aegirine9.DA.25NaFe3+Si2O6
β“˜Edenite9.DE.15NaCa2Mg5(Si7Al)O22(OH)2
β“˜Aluminoceladonite9.EC.15K(MgAlβ—»)(Si4O10)(OH)2
β“˜Kaolinite9.ED.05Al2(Si2O5)(OH)4
β“˜Nepheline9.FA.05Na3K(Al4Si4O16)
β“˜Sanidine9.FA.30K(AlSi3O8)
β“˜Analcime9.GB.05Na(AlSi2O6) Β· H2O
Unclassified
β“˜'Fayalite-Forsterite Series'-
β“˜'Hornblende Root Name Group'-β—»Ca2(Z2+4Z3+)(AlSi7O22)(OH,F,Cl)2

List of minerals for each chemical element

HHydrogen
Hβ“˜ AnalcimeNa(AlSi2O6) · H2O
Hβ“˜ EdeniteNaCa2Mg5(Si7Al)O22(OH)2
Hβ“˜ KaoliniteAl2(Si2O5)(OH)4
Hβ“˜ AluminoceladoniteK(MgAl◻)(Si4O10)(OH)2
Hβ“˜ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
OOxygen
Oβ“˜ AegirineNaFe3+Si2O6
Oβ“˜ AnalcimeNa(AlSi2O6) · H2O
Oβ“˜ EdeniteNaCa2Mg5(Si7Al)O22(OH)2
Oβ“˜ KaoliniteAl2(Si2O5)(OH)4
Oβ“˜ NephelineNa3K(Al4Si4O16)
Oβ“˜ SanidineK(AlSi3O8)
Oβ“˜ AluminoceladoniteK(MgAl◻)(Si4O10)(OH)2
Oβ“˜ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
FFluorine
Fβ“˜ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
NaSodium
Naβ“˜ AegirineNaFe3+Si2O6
Naβ“˜ AnalcimeNa(AlSi2O6) · H2O
Naβ“˜ EdeniteNaCa2Mg5(Si7Al)O22(OH)2
Naβ“˜ NephelineNa3K(Al4Si4O16)
MgMagnesium
Mgβ“˜ EdeniteNaCa2Mg5(Si7Al)O22(OH)2
Mgβ“˜ AluminoceladoniteK(MgAl◻)(Si4O10)(OH)2
AlAluminium
Alβ“˜ AnalcimeNa(AlSi2O6) · H2O
Alβ“˜ EdeniteNaCa2Mg5(Si7Al)O22(OH)2
Alβ“˜ KaoliniteAl2(Si2O5)(OH)4
Alβ“˜ NephelineNa3K(Al4Si4O16)
Alβ“˜ SanidineK(AlSi3O8)
Alβ“˜ AluminoceladoniteK(MgAl◻)(Si4O10)(OH)2
Alβ“˜ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
SiSilicon
Siβ“˜ AegirineNaFe3+Si2O6
Siβ“˜ AnalcimeNa(AlSi2O6) · H2O
Siβ“˜ EdeniteNaCa2Mg5(Si7Al)O22(OH)2
Siβ“˜ KaoliniteAl2(Si2O5)(OH)4
Siβ“˜ NephelineNa3K(Al4Si4O16)
Siβ“˜ SanidineK(AlSi3O8)
Siβ“˜ AluminoceladoniteK(MgAl◻)(Si4O10)(OH)2
Siβ“˜ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
ClChlorine
Clβ“˜ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
KPotassium
Kβ“˜ NephelineNa3K(Al4Si4O16)
Kβ“˜ SanidineK(AlSi3O8)
Kβ“˜ AluminoceladoniteK(MgAl◻)(Si4O10)(OH)2
CaCalcium
Caβ“˜ EdeniteNaCa2Mg5(Si7Al)O22(OH)2
Caβ“˜ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
FeIron
Feβ“˜ AegirineNaFe3+Si2O6

Other Regions, Features and Areas containing this locality

New Zealand
Pacific PlateTectonic Plate

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.

References

Price, R.C., Coombs, D.S. (1975) Phonolitic lava domes and other features of the Dunedin Volcano east Otago, Journal of the Royal Society of New Zealand, 5:2, 133-152.
Graham, I.T., Colchester, D.M., Harris, S., Lay, A., Burkett, D., Thornton, J. (2018) Aluminoceladonite pseudomorphs after euhedral nepheline from Pudding Island, near Portobello, Dunedin, New Zealand. Australian Journal of Mineralogy, 19:2, 21-25.
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