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5 mile post, Ascension Island, Saint Helena, Ascension and Tristan da Cunhai
Regional Level Types
5 mile post- not defined -
Ascension IslandIsland
Saint Helena， Ascension and Tristan da CunhaOverseas Territory

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Latitude & Longitude (WGS84):
7° 56' 58'' South , 14° 20' 49'' West
Latitude & Longitude (decimal):
-7.94967,-14.34719
GeoHash:
G#: 7wtfc8b9y
GRN:
S06W10
Nearest Settlements:
PlacePopulationDistance
Georgetown538 (2016)7.5km
Mindat Locality ID:
241435
Long-form identifier:
mindat:1:2:241435:8
GUID (UUID V4):
b5c55af4-54e6-4d5d-bf96-bd1512978fe4
Other/historical names associated with this locality:
Green Mountain


Granite blocks in trachytic breccias.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


8 valid minerals.

Detailed Mineral List:

β“˜ Aegirine
Formula: NaFe3+Si2O6
β“˜ Aenigmatite
Formula: Na4[Fe2+10Ti2]O4[Si12O36]
β“˜ Arfvedsonite
Formula: [Na][Na2][Fe2+4Fe3+]Si8O22(OH)2
β“˜ Dalyite
Formula: K2ZrSi6O15
β“˜ Eudialyte
Formula: Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
β“˜ Fayalite
Formula: Fe2+2SiO4
β“˜ 'Feldspar Group'
β“˜ 'Feldspar Group var. Perthite'
β“˜ Quartz
Formula: SiO2
β“˜ Zircon
Formula: Zr(SiO4)

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
β“˜Quartz4.DA.05SiO2
Group 9 - Silicates
β“˜Fayalite9.AC.05Fe2+2SiO4
β“˜Zircon9.AD.30Zr(SiO4)
β“˜Eudialyte9.CO.10Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
β“˜Aegirine9.DA.25NaFe3+Si2O6
β“˜Arfvedsonite9.DE.25[Na][Na2][Fe2+4Fe3+]Si8O22(OH)2
β“˜Aenigmatite9.DH.40Na4[Fe2+10Ti2]O4[Si12O36]
β“˜Dalyite9.EA.25K2ZrSi6O15
Unclassified
β“˜'Feldspar Group'-
β“˜'var. Perthite'-

List of minerals for each chemical element

HHydrogen
Hβ“˜ Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Hβ“˜ EudialyteNa15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
OOxygen
Oβ“˜ AegirineNaFe3+Si2O6
Oβ“˜ AenigmatiteNa4[Fe102+Ti2]O4[Si12O36]
Oβ“˜ Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Oβ“˜ DalyiteK2ZrSi6O15
Oβ“˜ EudialyteNa15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
Oβ“˜ FayaliteFe22+SiO4
Oβ“˜ QuartzSiO2
Oβ“˜ ZirconZr(SiO4)
NaSodium
Naβ“˜ AegirineNaFe3+Si2O6
Naβ“˜ AenigmatiteNa4[Fe102+Ti2]O4[Si12O36]
Naβ“˜ Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Naβ“˜ EudialyteNa15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
SiSilicon
Siβ“˜ AegirineNaFe3+Si2O6
Siβ“˜ AenigmatiteNa4[Fe102+Ti2]O4[Si12O36]
Siβ“˜ Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Siβ“˜ DalyiteK2ZrSi6O15
Siβ“˜ EudialyteNa15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
Siβ“˜ FayaliteFe22+SiO4
Siβ“˜ QuartzSiO2
Siβ“˜ ZirconZr(SiO4)
ClChlorine
Clβ“˜ EudialyteNa15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
KPotassium
Kβ“˜ DalyiteK2ZrSi6O15
CaCalcium
Caβ“˜ EudialyteNa15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
TiTitanium
Tiβ“˜ AenigmatiteNa4[Fe102+Ti2]O4[Si12O36]
FeIron
Feβ“˜ AegirineNaFe3+Si2O6
Feβ“˜ AenigmatiteNa4[Fe102+Ti2]O4[Si12O36]
Feβ“˜ Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Feβ“˜ EudialyteNa15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
Feβ“˜ FayaliteFe22+SiO4
ZrZirconium
Zrβ“˜ DalyiteK2ZrSi6O15
Zrβ“˜ EudialyteNa15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
Zrβ“˜ ZirconZr(SiO4)

Other Regions, Features and Areas containing this locality

Atlantic Ocean
South America 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

(n.d.)
Harris, C., Cressey, G., Bell, J.D., Atkins, F.B., Beswetherick, S. (1982) An Occurrence of Rare-Earth-Rich Eudialyte from Ascension Island, South Atlantic. Mineralogical Magazine: 46(341): 421-425.
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